a small aperture, such as one in the door of a flat for observing callers before opening
WordReference Random House Learner's Dictionary of American English © 2026
peep•hole /ˈpipˌhoʊl/USA pronunciation
n. [countable]
WordReference Random House Unabridged Dictionary of American English © 2026- a small hole, as in a door, through which to look.
peep•hole
(pēp′hōl′),USA pronunciation n.
- a small hole or opening through which to peep or look, as in a door.
- peep1 + hole 1675–85
Collins Concise English Dictionary © HarperCollins Publishers::
'peephole' also found in these entries (note: many are not synonyms or translations):