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A stamp issued without perforations.
Also known as: Imperf notation, Unperforated stamp
In philately an imperforate stamp is one issued without perforations, separated by cutting rather than tearing, and is described as such in a catalogue entry.
Was the original condition of postage stamps, perforation being an invention that came after the stamp itself.
Contexts: History
A rectangle of paper with plain straight edges and no punched holes, its margins cut rather than torn.