non-

1. a prefix meaning “not,” freely used as an English formative, usually with a simple negative force as implying mere negation or absence of something (rather than the opposite or reverse of it, as often expressed by un-1): nonadherence; noninterference; nonpayment; nonprofessional.

prefix

1. indicating negationnonexistent
2. indicating refusal or failurenoncooperation
3. indicating exclusion from a specified class of persons or thingsnonfiction
4. indicating lack or absence, esp of a quality associated with what is specifiednonobjective; nonevent

prefix meaning “not, lack of,” or “sham,” 14c., from Anglo-French noun-, from Old French non-, from Latin non “not, by no means, not at all, not a,” from Old Latin noenum “not one” (*ne oinom, from PIE *ne “not” + *oi-no-; see one). In some cases perhaps from Middle English non “not” (adj.), from Old English nan (see not). pref.

1. Not:noninvasive.