cageEnglishOxford American Thesauruscage noun people are increasingly uneasy about going to see animals in cages: enclosure, pen, pound; coop, hutch, crate; birdcage, aviary, mew; North American corral.verb many animals are captured and caged in conditions of extreme cruelty: confine, shut in/up, pen, lock up, coop up, immure, incarcerate, imprison, impound; mew; North American corral.