ˈcat flapBritish EnglishBrE, pet doorAmerican EnglishAmE noun [countableC]
DHPa small hole cut into a door and covered with wood or plastic that moves to allow a petcat to enter or leave a house 〔开在门上供家猫进出房屋的〕猫洞,活板门
Examples from the Corpus
cat flap• I hear the thump of the cat flap as Cat O'Fun tumbles through it without the felinegrace of his fellows.• Became confident and prised the cat flap open again.• Somebody had left me a note, though, through the cat flap in my flat door.• It's only a matter of time till he learns to use the cat flap.