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

He stood on his toes and looked through the peephole.

From Literature

When he put his eye to a peephole in the cell door, the eye of a guard stared back at him.

From Literature

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 whether ICE agents are outside.

From Los Angeles Times

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

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

From BBC