—n. 1. lac that has been purified and formed into thin sheets, used for making varnish.
2. a varnish (shellac' var"nish) made by dissolving this material in alcohol or a similar solvent.
3. a phonograph record made of a breakable material containing shellac, esp. one to be played at 78 r.p.m.: an LP that can hold nearly 10 times as much as the old shellac.
—v.t. 1. to coat or treat with shellac.
2. Slang. a. to defeat; trounce.
b. to thrash soundly. Also,shel•lack'.