English dictionary
joist
/dZ///Oi//st/
Definitions, examples, synonyms and antonyms from WordNet 3.0.
noun
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beam used to support floors or roofs
Source: WordNet 3.0
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A piece of timber laid horizontally, or nearly so, to which the planks of the floor, or the laths or furring strips of a ceiling, are nailed; -- called, according to its position or use, <i>binding joist</i>, <i>bridging joist</i>, <i>ceiling joist</i>, <i>trimming joist</i>, etc. See <i>Illust.</i> of <i>Double-framed floor</i>, under <u>Double</u>, <pos><i>a.</i></pos>
Source: webster1913
verb
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To fit or furnish with joists.
Source: webster1913