Definition of extensionnext
1
as in stretching
the act of making longer the board's extension of the school year drew howls of protest

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

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Example Sentences

Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Recent Examples of extension Home offices for many are an extension or replacement for the traditional office. Tribune News Service, Baltimore Sun, 11 Mar. 2026 The defense to all of this is the 11 contract extensions signed since July 2024. Troy Renck, Denver Post, 11 Mar. 2026 The new three-year extension will make Mohegan Sun the second longest-running host site in the tournament’s history. Emily Adams, Hartford Courant, 11 Mar. 2026 The Patriots signed Jennings to a three-year, $12 million extension before the 2024 season. Doug Kyed, Boston Herald, 11 Mar. 2026 See All Example Sentences for extension
Recent Examples of Synonyms for extension
Noun
  • After some stretching and instruction, I was let loose in the Atlantic.
    Austin Bush, Travel + Leisure, 9 Mar. 2026
  • The rover has spent roughly six months exploring unusual geological formations on Mars known as boxwork — crisscrossing ridges that resemble giant spiderwebs stretching across the surface for miles when viewed from orbit.
    Ryan Brennan, Kansas City Star, 4 Mar. 2026
Noun
  • The gift was designated to further advance and highlight essential and high-level glioblastoma research at UC San Diego, in addition to inspiring others to follow suit and ultimately contribute to this critical and developing area of medical research.
    Ashley Mackin Solomon, San Diego Union-Tribune, 11 Mar. 2026
  • The addition of Crosby was supposed to be the piece to help lift the Ravens over the top, with the draft picks expected to be part of a rebuilding effort for the Raiders.
    Los Angeles Times, Los Angeles Times, 11 Mar. 2026

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Cite this Entry

“Extension.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/extension. Accessed 18 Mar. 2026.

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