/plad/ , n.
1. any fabric woven of differently colored yarns in a crossbarred pattern.
2. a pattern of this kind.
3. a long, rectangular piece of cloth, usually with such a pattern and worn across the left shoulder by Scottish Highlanders.
adj.
4. having the pattern of a plaid.
[ 1505-15; plaide blanket, plaid (def. 3) ]