Webster’s Revised Unabridged Dictionary · 1913
Plait
Plait (plāt; collog. plēt; 277), n. [OE. playte, OF. pleit, L. plicatum, plicitum, p. p. of plicare to fold, akin to plectere to plait. See Ply, and cf. Plat to weave, Pleat, Plight fold.] 1. A flat fold; a doubling, as of cloth; a pleat; as, a box plait.
The plaits and foldings of the drapery. Addison.
2. A braid, as of hair or straw; a plat.
Polish plait. (Med.) Same as Plica.
Plait, v. t. [imp. & p. p. Plaited; p. pr. & vb. n. Plaiting.] 1. To fold; to double in narrow folds; to pleat; as, to plait a ruffle.
2. To interweave the strands or locks of; to braid; to plat; as, to plait hair; to plait rope.