Definition of plump

• adv. - Well rounded or filled out; full; fleshy; fat; as, a plump baby; plump cheeks.
• n. - A knot; a cluster; a group; a crowd; a flock; as, a plump of trees, fowls, or spears.
• a. - To grow plump; to swell out; as, her cheeks have plumped.
• a. - To drop or fall suddenly or heavily, all at once.
• a. - To give a plumper. See Plumper, 2.
• v. t. - To make plump; to fill (out) or support; -- often with up.
• v. t. - To cast or let drop all at once, suddenly and heavily; as, to plump a stone into water.
• v. t. - To give (a vote), as a plumper. See Plumper, 2.
• a. & v. - Directly; suddenly; perpendicularly.