: any of the small timbers or metal beams ranged parallel from wall to wall in a structure to support a floor or ceiling

Illustration of joist

Illustration of joist
  • J joist

Examples of joist in a Sentence

Recent Examples on the Web
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.
Machines cut lumber and route utility pathways; nail guns connect joists, studs and weather wrap; other machines blow in insulation, all guided by a digital model. Sam Lubell, Los Angeles Times, 9 May 2025 Ask the Builder: Jazz up your interior walls The anchors are screwed to the joists above. Tim Carter, Hartford Courant, 1 Mar. 2025 The tubes can be structural elements, just as steel beams, concrete columns, and wooden joists can. Justin Davidson, Curbed, 18 July 2024 Nailing a loose floorboard into the joist below should eliminate the rattle or squeak. Clark Hodgin, New York Times, 28 Mar. 2025 See All Example Sentences for joist

Word History

Etymology

Middle English giste, joiste, from Anglo-French giste, from Vulgar Latin *jacitum, from Latin jacēre to lie — more at adjacent

First Known Use

15th century, in the meaning defined above

Time Traveler
The first known use of joist was in the 15th century

Browse Nearby Words

Cite this Entry

“Joist.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/joist. Accessed 20 May. 2025.

Kids Definition

joist

noun
: a small beam laid crosswise to support a floor or ceiling

More from Merriam-Webster on joist

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