nonplenumWiktionary 原文英美构词拆解nonnon-前缀plenumplenum词干non-Used in the sense of no or none, to show lack of or failure to perform; or in the sense of not, to negate the meaning of the word to which it is prefixed.词源说明From non- + plenum.释义形容词adjective1Not being, not in, or not suitable for a building's plenum space.