1Expressing negation or absence.‘non-aggression’
- 1.1Not of the kind or class described.‘non-believer’
- 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.‘non-skid’
4Expressing a neutral negative sense when a corresponding form beginning with in- or un- has a special connotation (such as non-human compared with inhuman).
The prefixes non- and un- both have the meaning ‘not’, but tend to be used with a difference of emphasis. See
From Latin non ‘not’.