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

Recent Examples of joist from the Web

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'joist'. Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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


JOIST Defined for English Language Learners

joist

play
noun

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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