- a common European bird, Cuculus canorus, of the family Cuculidae, noted for its characteristic call and its brood parasitism.
- any of several other birds of the family Cuculidae.
- the call of the cuckoo, or an imitation of it.
- a crazy, silly, or foolish person; simpleton.
- to utter the call of the cuckoo or an imitation of it.
- to repeat monotonously.
- crazy; silly; foolish.
- of, relating to, or like a cuckoo.
- any bird of the family Cuculidae, having pointed wings, a long tail, and zygodactyl feet: order Cuculiformes. Many species, including the European cuckoo (Cuculus canorus), lay their eggs in the nests of other birds and have a two-note call
- an insane or foolish person
- insane or foolish
- an imitation or representation of the call of a cuckoo
- to repeat over and over
- to make the sound imitated by the word cuckoo