From Longman Dictionary of Contemporary Englishcuckoo clockˈcuckoo clock noun [countable] TMCa clock with a wooden bird inside that comes out every hour and makes a sound
Examples from the Corpus
cuckoo clock• Beside the portrait was a carved cuckoo clock with green ivy and purple grapes growing around a green front door.• There was a grotesque inventiveness, a deliberate eccentricity in the idea of the cuckoo clock that Melanie had never encountered.• Melanie and Aunt Margaret sat in complete silence but for the ponderous ticking of the cuckoo clock and its regular two note interjections.• The cuckoo clock spun round and round. 