- 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.
- indicating negation
- indicating refusal or failure
- indicating exclusion from a specified class of persons or things
- indicating lack or absence, esp of a quality associated with what is specified
