plaid /plæd/noun 3adjective 1forms 3 noun3 •A type of twilled woollen cloth, often with a tartan or chequered pattern. •The typical chequered pattern of a plaid; tartan. •A length of such material used as a piece of clothing, formerly worn in the Scottish Highlands and other parts of northern Britain and remaining as an item of ceremonial dress worn by members of Scottish pipe bands.In battle, the plaid was customarily shrugged off before the charge bit home, and the warrior came into contact with only his long, saffron shirt (‘leine chrochach’) to preserve modesty. — 2009 adjective1 •Having a pattern or colors which resemble a Scottish tartan; checkered or marked with bars or stripes at right angles to one another. formsplaids · more plaid · most plaid