Definition of Synonym

Synonym

An incorrect or incorrectly applied scientific name, as a new name applied to a species or genus already properly named, or a specific name preoccupied by that of another species of the same genus; -- so used in the system of nomenclature (which see) in which the correct scientific names of certain natural groups (usually genera, species, and subspecies) are regarded as determined by priority.

One of two or more words corresponding in meaning but of different languages; a heteronym.

One of two or more words (commonly words of the same language) which are equivalents of each other; one of two or more words which have very nearly the same signification, and therefore may often be used interchangeably. See under Synonymous.

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Synonym Quotations

Greatness is so often a courteous synonym for great success.
Philip Guedalla

I am thinking of taking a fifth wife. Why not? Solomon had a thousand wives and he is a synonym for wisdom.
John Barrymore

A synonym is a word you use when you can't spell the word you first thought of.
Burt Bacharach