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Symbols designed to stop you: hazard marks, prohibitions and warnings, drawn deliberately to be alarming at a glance.
These look dangerous because they are doing their job. The danger is in what they warn about, not in the symbol.
This describes how the symbol looks, drawn from its recorded visual attributes. Appearance is not meaning: a symbol can look alarming and mean something ordinary.
A bar struck through the symbol is the standard visual grammar for “do not”, which reads as a hard stop.
A small note with a stroke through its stem, crushed against the beat.
A bar struck through the symbol is the standard visual grammar for “do not”, which reads as a hard stop.
A capital letter B with a single vertical stroke rising above and below it, the sign for the Thai baht.
A bar struck through the symbol is the standard visual grammar for “do not”, which reads as a hard stop.
A crossed-out wheeled bin symbol, sometimes marked with Pb, Cd or Hg, required on batteries under EU law to signal separate collection.
A bar struck through the symbol is the standard visual grammar for “do not”, which reads as a hard stop.
A theta with a B subscript, the angle of complete polarisation.
A bar struck through the symbol is the standard visual grammar for “do not”, which reads as a hard stop.
An integral sign struck through with a short bar, meaning a symmetric limit around a singularity.
A bar struck through the symbol is the standard visual grammar for “do not”, which reads as a hard stop.
A struck-through marginal instruction.
A bar struck through the symbol is the standard visual grammar for “do not”, which reads as a hard stop.
A theta with a c subscript, beyond which light cannot escape.
A bar struck through the symbol is the standard visual grammar for “do not”, which reads as a hard stop.
An ear of wheat crossed through, marking a certified gluten-free product.
A bar struck through the symbol is the standard visual grammar for “do not”, which reads as a hard stop.
A stroke through a square or circle meaning the person has died.
A bar struck through the symbol is the standard visual grammar for “do not”, which reads as a hard stop.
A struck-through vertical stroke, denying exact division.
A bar struck through the symbol is the standard visual grammar for “do not”, which reads as a hard stop.
A lower-case letter d crossed by a short horizontal stroke through its ascender, with a line beneath, the sign for the Vietnamese đồng.
A bar struck through the symbol is the standard visual grammar for “do not”, which reads as a hard stop.
A circle struck by diagonal bars, cancelling what went before.
A bar struck through the symbol is the standard visual grammar for “do not”, which reads as a hard stop.
A Greek phi of a number, counting coprime predecessors.
A bar struck through the symbol is the standard visual grammar for “do not”, which reads as a hard stop.
An outlined ear with a diagonal bar, usually with a 'T' in the lower-right corner — indicating an assistive listening system, and specifically an induction loop when the T is present.
A bar struck through the symbol is the standard visual grammar for “do not”, which reads as a hard stop.
A rounded letter S laid on its side with an open curve, crossed by two short horizontal strokes, the sign for the Ukrainian hryvnia.
A bar struck through the symbol is the standard visual grammar for “do not”, which reads as a hard stop.
A pale circle crossed by diagonal bars.
A bar struck through the symbol is the standard visual grammar for “do not”, which reads as a hard stop.
A speaker with a cross or slash, silencing audio output.
A bar struck through the symbol is the standard visual grammar for “do not”, which reads as a hard stop.
A capital letter N crossed by two short horizontal strokes, the sign for the Nigerian naira.
A bar struck through the symbol is the standard visual grammar for “do not”, which reads as a hard stop.
Two angular forms side by side, each an upright with a horizontal arm, joined at the top by a continuous line, the sign for the Israeli new shekel.
A bar struck through the symbol is the standard visual grammar for “do not”, which reads as a hard stop.
A struck-through epsilon, denying membership of a set.
A bar struck through the symbol is the standard visual grammar for “do not”, which reads as a hard stop.
A Greek phi or delta, how far into a cycle a wave is.
A bar struck through the symbol is the standard visual grammar for “do not”, which reads as a hard stop.
A capital letter P crossed by two short horizontal strokes, the sign for the Philippine peso.
A bar struck through the symbol is the standard visual grammar for “do not”, which reads as a hard stop.
A capital letter R with a stroke across its leg, heading a prescription.
A bar struck through the symbol is the standard visual grammar for “do not”, which reads as a hard stop.
A sideways U with a struck-through bar, excluding the case of equality.
A bar struck through the symbol is the standard visual grammar for “do not”, which reads as a hard stop.
A struck-through h, Planck's constant divided by two pi.
A bar struck through the symbol is the standard visual grammar for “do not”, which reads as a hard stop.
A capital letter P with a closed bowl, crossed by a single short horizontal stroke at the foot of its stem, the sign for the Russian ruble.
A bar struck through the symbol is the standard visual grammar for “do not”, which reads as a hard stop.
A p with a crossed descender.
A bar struck through the symbol is the standard visual grammar for “do not”, which reads as a hard stop.
A q with a stroke through its tail.
A bar struck through the symbol is the standard visual grammar for “do not”, which reads as a hard stop.
A crossed stroke closing a genitive plural.
A bar struck through the symbol is the standard visual grammar for “do not”, which reads as a hard stop.
A struck-through capital with a marginal note.
A bar struck through the symbol is the standard visual grammar for “do not”, which reads as a hard stop.
A small circle, often struck through, raised after a quantity.
A bar struck through the symbol is the standard visual grammar for “do not”, which reads as a hard stop.
A capital letter T with a second horizontal bar below its crossbar, the sign for the Kazakhstani tenge.
A bar struck through the symbol is the standard visual grammar for “do not”, which reads as a hard stop.
A letter L leaning to the right with an upward hook at the foot, crossed by two short strokes rising to the right, the sign for the Turkish lira.
A bar struck through the symbol is the standard visual grammar for “do not”, which reads as a hard stop.
A crossed-out wheeled bin symbol required on electrical and electronic products under EU law, instructing separate collection rather than general disposal.
A bar struck through the symbol is the standard visual grammar for “do not”, which reads as a hard stop.
A capital letter W crossed by two short horizontal strokes, the sign for the South Korean won.
The setting this symbol is used in invites this impression. It describes the context, not the symbol's definition.
Showing the 48 strongest of 497. Browse by domain to see every symbol in the catalogue.
It is catalogued as a warning symbol — a mark whose job is to be noticed and heeded quickly.
An amber dashboard icon reading 'ABS' inside an oval, warning of a fault in the anti-lock braking system.
It is catalogued as a warning symbol — a mark whose job is to be noticed and heeded quickly.
A coloured band with a letter.
It is catalogued as a warning symbol — a mark whose job is to be noticed and heeded quickly.
An amber droplet or tank: the exhaust fluid is low.
It is catalogued as a warning symbol — a mark whose job is to be noticed and heeded quickly.
A cycle reservoir between two stop lines at a junction.
It is catalogued as a prohibition symbol — a mark whose job is to be noticed and heeded quickly.
A hatched boundary round a restricted volume.
It is catalogued as a warning symbol — a mark whose job is to be noticed and heeded quickly.
A dashboard icon of a seated figure with an airbag outline in front of them, warning of a fault in the airbag/supplemental restraint system.
It is catalogued as a warning symbol — a mark whose job is to be noticed and heeded quickly.
Coloured arcs around an airspeed dial.
It is catalogued as a warning symbol — a mark whose job is to be noticed and heeded quickly.
White and blue swallow-tail: a diver is down, keep clear at slow speed.
It is catalogued as a warning symbol — a mark whose job is to be noticed and heeded quickly.
Bold or otherwise emphasised words in an ingredients list, marking allergens.
It is catalogued as a warning symbol — a mark whose job is to be noticed and heeded quickly.
A grade that is an opinion.
It is catalogued as a warning symbol — a mark whose job is to be noticed and heeded quickly.
A black octagon: high in sugars.
It is catalogued as a warning symbol — a mark whose job is to be noticed and heeded quickly.
A black octagon: high in calories.
It is catalogued as a warning symbol — a mark whose job is to be noticed and heeded quickly.
A black octagon: high in saturated fat.
It is catalogued as a warning symbol — a mark whose job is to be noticed and heeded quickly.
A black octagon: high in sodium.
It is catalogued as a prohibition symbol — a mark whose job is to be noticed and heeded quickly.
An anchor mark showing where a vessel may anchor.
It is catalogued as a warning symbol — a mark whose job is to be noticed and heeded quickly.
A black and white panel with a lower-case a device.
It is catalogued as a warning symbol — a mark whose job is to be noticed and heeded quickly.
A miniature aircraft against a split brown and blue disc.
It is catalogued as a warning symbol — a mark whose job is to be noticed and heeded quickly.
A yellow sign giving a recommended rather than legal speed.
It is catalogued as a warning symbol — a mark whose job is to be noticed and heeded quickly.
Adhesive tape whose pale stripes turn dark after processing.
It is catalogued as a warning symbol — a mark whose job is to be noticed and heeded quickly.
Five levels, not evenly spaced.
It is catalogued as a warning symbol — a mark whose job is to be noticed and heeded quickly.
Colour standing for depth.
It is catalogued as a warning symbol — a mark whose job is to be noticed and heeded quickly.
A red battery-shaped dashboard icon warning that the vehicle's charging system, not necessarily the battery itself, has a fault.
It is catalogued as a warning symbol — a mark whose job is to be noticed and heeded quickly.
Coloured symbols carrying a letter or number.
It is catalogued as a prohibition symbol — a mark whose job is to be noticed and heeded quickly.
Red-and-yellow, red, black-and-white chequered — and the one that is not a warning.
It is catalogued as a warning symbol — a mark whose job is to be noticed and heeded quickly.
One bit, sent a hundred miles.
It is catalogued as a warning symbol — a mark whose job is to be noticed and heeded quickly.
Wind force 0 to 12, described by what it does rather than measured.
It is catalogued as a warning symbol — a mark whose job is to be noticed and heeded quickly.
Two date marks meaning quite different things.
It is catalogued as a warning symbol — a mark whose job is to be noticed and heeded quickly.
A trefoil of overlapping circles, designed to be instantly recognisable as a warning for biological hazards.
It is catalogued as a warning symbol — a mark whose job is to be noticed and heeded quickly.
A number from one to four rating containment.
It is catalogued as a warning symbol — a mark whose job is to be noticed and heeded quickly.
Split diagonally, black and white.
It is catalogued as a warning symbol — a mark whose job is to be noticed and heeded quickly.
Plain black, with a car number.
It is catalogued as a warning symbol — a mark whose job is to be noticed and heeded quickly.
An orange circle on black.
It is catalogued as a prohibition symbol — a mark whose job is to be noticed and heeded quickly.
A triangle outline, the GINETEX base symbol for bleaching instructions on a garment care label.
It is catalogued as a warning symbol — a mark whose job is to be noticed and heeded quickly.
Rows of raised domes warning of a crossing point.
It is catalogued as a warning symbol — a mark whose job is to be noticed and heeded quickly.
Plain blue.
It is catalogued as a prohibition symbol — a mark whose job is to be noticed and heeded quickly.
A yellow cross-hatched square a driver may not stop in.
It is catalogued as a warning symbol — a mark whose job is to be noticed and heeded quickly.
A red circle-and-exclamation-mark dashboard icon, often flanked by curved brackets, warning of a parking-brake or hydraulic brake-system fault.
It is catalogued as a warning symbol — a mark whose job is to be noticed and heeded quickly.
Plain red swallow-tail: dangerous cargo.
It is catalogued as a warning symbol — a mark whose job is to be noticed and heeded quickly.
A diamond showing a running animal.
It is catalogued as a warning symbol — a mark whose job is to be noticed and heeded quickly.
A diamond showing a bicycle.
It is catalogued as a warning symbol — a mark whose job is to be noticed and heeded quickly.
A lens on a black bar.
It is catalogued as a prohibition symbol — a mark whose job is to be noticed and heeded quickly.
A circle carrying a letter E.
It is catalogued as a prohibition symbol — a mark whose job is to be noticed and heeded quickly.
A red-bordered circle imposing a requirement.
It is catalogued as a warning symbol — a mark whose job is to be noticed and heeded quickly.
A diamond showing two children.
It is catalogued as a warning symbol — a mark whose job is to be noticed and heeded quickly.
A diamond warning of a lombada ahead.
It is catalogued as a prohibition symbol — a mark whose job is to be noticed and heeded quickly.
A red octagon lettered PARE.
It is catalogued as a warning symbol — a mark whose job is to be noticed and heeded quickly.
A yellow diamond standing on its corner.
It is catalogued as a warning symbol — a mark whose job is to be noticed and heeded quickly.
A permanent magnet set between the rails.