WordReference Random House Unabridged Dictionary of American English © 2025
lap•per1
(lap′ər),USA pronunciation n.
lap•per2 (lap′ər),USA pronunciation v.i. [Scot. and North Eng.]
- a person or thing that laps liquid.
- lap3 + -er1 1600–10
lap•per2 (lap′ər),USA pronunciation v.i. [Scot. and North Eng.]
- Scottish Termsto clabber;
curdle.
- Scots form of lopper2 1805–15