1Expressing negation or absence.‘nonaggression’
- 1.1Not of the kind or class described.‘nonbeliever’
- 1.2Not of the importance implied.
2(added to adverbs) not in the way described.
3(added to verbs to form adjectives) not causing or requiring.‘nonskid’
4Expressing a neutral negative sense when a corresponding form beginning with in- or un- has a special connotation (such as nonhuman compared with inhuman).
The prefixes non- and un- both have the meaning ‘not,’ but tend to be used with a difference of emphasis. See un-
From Latin non ‘not’.