Longman Dictionary of Contemporary English homepage

Date: 1300-1400
Origin: Perhaps from Dutch kieken 'to look'

peek

verb
     
peek [intransitive]
1 to look quickly at something, or to look at something from behind something else, especially something that you are not supposed to see [↪ peep]
peek at/through/into etc
Carefully he peeked through the glass window in the door.
Paula opened the box and peeked inside.
Shut your eyes and don't peek!
2 [always + adverb/preposition] if something peeks from somewhere, you can just see a small amount of it:
The moon peeked out from behind the clouds.
peek noun [countable]
Diane took a quick peek at herself in the mirror.

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