\Plaid\, n. [Gael. plaide a blanket or plaid, contr. fr.
peallaid a sheepskin, fr. peall a skin or hide. CF.
{Pillion}.]
1. A rectangular garment or piece of cloth, usually made of
   the checkered material called tartan, but sometimes of
   plain gray, or gray with black stripes. It is worn by both
   sexes in Scotland.
2. Goods of any quality or material of the pattern of a plaid
   or tartan; a checkered cloth or pattern.

\Plaid\, a.
Having a pattern or colors which resemble a Scotch plaid;
checkered or marked with bars or stripes at right angles to
one another; as, plaid muslin.