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. non-, 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; nonpayment; nonprofessional. Find similar words to non- using the buttons below. Non- definition: Not. Non- is used in front of nouns to form nouns which refer to situations where a particular action has not or will not take place. He was disqualified from the council for non-attendance. Both countries agreed on non-interference in each other's internal affairs. The available prefixes in French include A-, CONTRE-, DÉ (S)-, IN-, NON-, MAL-, and MÉ (S)-. You will notice the same thing as with Spanish, which is the lack of the un- prefix. NON- definition: 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 byun- ): nonadherence; noninterference; nonpayment; nonprofessional. NON- definition: 1. used to add the meaning not or the opposite of to adjectives and nouns: 2. used to add the…. Learn more. The meaning of NON- is not : other than : reverse of : absence of. How to use non- in a sentence. NON- definition: not or the opposite of. Learn more. Search the world's information, including webpages, images, videos and more. Google has many special features to help you find exactly what you're looking for.