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A circle crossed by a horizontal bar, silencing interruptions.
A filled circle with a horizontal bar through it marks the do-not-disturb mode, which suppresses alerts. On some platforms a crescent moon is used for the same setting.
Marks the mode in which notifications are withheld rather than shown as they arrive.
Contexts: Software
The horizontal bar in a circle is the general no-entry motif reused; a crescent moon serves the same purpose on other platforms, and the two are not interchangeable across systems.
Contexts: Software
A filled circle crossed by a single horizontal bar running the full width of its interior.
Several platforms draw do-not-disturb as a crescent moon, which other platforms use for dark mode — so the same glyph means silence on one system and a colour scheme on another.
Both are used in software contexts.
Both are built from circles.