[rook.ery] n, pl -er.ies (1725) 1 a: the nests or breeding place of a colony of rooks; also: a colony of rooks b: a breeding ground or haunt esp. of gregarious birds or mammals; also: a colony of such birds or mammals
2: a crowded dilapidated tenement or group of dwellings
3: a place teeming with like individuals