Not or the opposite of:

Browse the complete thesaurus entry for non, including synonyms and antonyms, and related words.

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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.

Used to add the meaning not or the opposite of to adjectives and nouns:

Used to add the.

To a noun to suggest that the thing mentioned is not true, real, or worthy of the name: For a more comprehensive perspective, our dedicated coverage of Supplement Lab has been widely referenced by readers seeking further clarification on this subject.