Entry 4 senses · 2 variants Webster, 1913 Conservatory /kən-sẽrv'-ət-ôr-ē/ · Con·serv·a·to·ry · IPA /kənˈsɝ.vəˌt(ɔ.)ɹi/ a. n. 01 a. Having the quality of preserving from loss, decay, or injury. 1. Having the quality of preserving from loss, decay, or injury. 02 n. That which preserves from injury. 1. That which preserves from injury.[Obs.] 2. A place for preserving anything from loss, decay, waste, or injury; particulary, a greenhouse for preserving exotic or tender plants. 3. A public place of instruction, designed to preserve and perfect the knowledge of some branch of science or art, esp. music.