Synonyms & Antonyms of extension

1 the act of making longer
  • the board's extension of the school year drew howls of protest

Synonyms for extension

Antonyms for extension

2 a smaller structure added to a main building
  • the new extension will connect the house with what is now a freestanding garage

Synonyms for extension

Words Related to extension

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Time Traveler for extension

Time Traveler

The first known use of extension was in the 15th century

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Cite this Entry

“Extension.” The Thesaurus, Merriam-Webster Inc., Accessed 10 December 2019.

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More from Merriam-Webster on extension

Dictionary: Definition of extension

Rhyming Dictionary: Words that rhyme with extension

Medical Dictionary: Definition of extension

Spanish Central: Translation of extension

Nglish: Translation of extension for Spanish Speakers

Britannica English: Translation of extension for Arabic Speakers Encyclopedia article about extension

Comments on extension

What made you want to look up extension? Please tell us where you read or heard it (including the quote, if possible).


to state or do over again or repeatedly

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