Pronunciation: (zOO),[key] —n., —pl.zoos. 1. Also called zoological garden. a parklike area in which live animals are kept in cages or large enclosures for public exhibition.
2. Informal.a place, activity, or group marked by chaos or unrestrained behavior.
a combining form meaning “living being,” “animal,” used in the formation of compound words: zoometry; zooplankton.Also,esp. before a vowel,zo-.