joist

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noun \ˈjȯist\

Definition of joist

  1. :  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

Origin and Etymology of joist

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


JOIST Defined for English Language Learners

joist

play
noun \ˈjȯist\

Definition of joist for English Language Learners

  • : a strong, heavy board that supports a floor or ceiling


JOIST Defined for Kids

joist

play
noun \ˈjȯist\

Definition of joist for Students

  1. :  any of the small timbers or metal beams laid crosswise in a building to support a floor or ceiling


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