joist /d͡ʒɔɪst/noun 1verb 1forms 3 noun1 •A piece of timber or steel laid horizontally, or nearly so, to which the planks of the floor, or the laths or furring strips of a ceiling, are nailed.[…] even the carpenters who made her over for the service had not thought her worth the trouble, and had done their worst by her. The new partitions were hung to the joists by a few nails. — 1923 verb1 •To fit or furnish with joists.The floors are joisted with sapling tree trunks, and the flooring itself is made of bark, split and pounded flat into strips. No attempt is made either to fasten or join the strips of flooring. — 2001 formsjoisted · joisting · joists
