Webster's Revised Unabridged Dictionary · 1913

Plait

Plait , noun

[Old English playte, Old French pleit, Latin plicatum, plicitum, past participle of plicare to fold, akin to plectere to plait. See Ply, and compare 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.
Collocations (1)
Polish plait (Medicine) , Same as Plica.

Plait , transitive verb

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.