peephole

American  

[peep-hohl] / ˈpipˌhoʊl /

noun

1. a small hole or opening through which to peep or look, as in a door.

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peephole British  

/ ˈpiːpˌhəʊl /

noun

1. a small aperture, such as one in the door of a flat for observing callers before opening

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Etymology

Origin of peephole

First recorded in 1675–85; peep ¹ + hole

Example Sentences

If you’re home alone or with family members and you hear a knock at the door, check the window, security camera or peephole so you can identify if ICE agents are outside.

From Los Angeles Times • Feb. 22, 2025

He then heard a second, "very aggressive knock" but did not see anyone when he looked through the peephole.

From BBC • May 9, 2024

A few minutes later, Fortson heard a louder knock but didn’t see anyone when he looked through the peephole, Crump said, citing the woman’s account.

From Seattle Times • May 8, 2024

She remains there for an indefinite amount of time, rummaging through the preserves, catching rainwater, peering out of a peephole.

From New York Times • Dec. 1, 2022

A rectangular peephole slides open, revealing male eyes under a single bushy brow.

From "Water for Elephants" by Sara Gruen