Meaning of NON- in English

non- /nɒn $ nɑːn/ BrE AmE prefix

[ Language: Old French ; Origin: Latin non 'not' ]

1 . [in adjectives, nouns, and adverbs] used to say that someone or something is not a particular thing, or does not do a particular thing:

non-British visitors

a non-smoker (=someone who does not smoke)

a non-stop flight (=one in which a plane flies from one place to another without stopping on the way)

2 . [in nouns] used to refer to a situation where a particular action did not happen or will not happen:

non-payment of taxes

They were very disappointed at his non-appearance (=the fact that he did not go to an event where he was expected) .

Longman Dictionary of Contemporary English.      Longman - Словарь современного английского языка.