cuckoo

Main Entry: ¹cuck·oo 

Pronunciation: \ˈkü-(ˌ)kü, ˈku̇-\

Function: noun

Inflected Form(s): plural cuckoos

Etymology: Middle English cuccu, of imitative origin

Date: 13th century

1 : a largely grayish-brown European bird (Cuculus canorus) that is a parasite given to laying its eggs in the nests of other birds which hatch them and rear the offspring; broadly : any of a large family (Cuculidae of the order Cuculiformes) to which this bird belongs
2 : the call of the cuckoo
3 : a silly or slightly crackbrained person