Definition of peephole
: a hole or crevice to peep through
First Known Use of peephole
PEEPHOLE Defined for English Language Learners
Definition of peephole for English Language Learners
: a hole that is used to look through something (such as a door) to the other side
Seen and Heard
What made you want to look up peephole? Please tell us where you read or heard it (including the quote, if possible).