Webster's English Dictionary

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shellac

1. shel.lac \sh*-'lak\ n 1: purified lac resin usu. prepared in thin orange 
   or yellow flakes by heat ing and filtering and often bleached white 2: a 
   preparation of lac dissolved usu. in alcohol and used chiefly as a woo d 
   filler and finish 3: a composition containing shellac used for making 
   phonograph records 
2. shellac vt or shel.lacked;  or shel.lack.ing 1: to coat or otherwise 
   treat with shellac or a shellac varnish  2: to defeat decisively or 
   ignominiously