Search more than 275,000 synonyms, antonyms, related words, and idiomatic phrases. The thesaurus is more than just a list of synonyms; it is your guide to more precise and effective use of language.
Definition of synonym
1 : one of two or more words or expressions of the same language that have the same or nearly the same meaning in some or all senses
2a : a word or phrase that by association is held to embody something (such as a concept or quality)
a tyrant whose name has become a synonym for oppression
b : metonym
3 : one of two or more scientific names used to designate the same taxonomic group — compare homonym
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The first known use of synonym was in the 15th century
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