WordWeb Online

1. Finish a task completely
   "I finally polished off this homework assignment";
   - get through, wrap up, finish off, mop up, clear up, finish up
    
2. Kill intentionally and with premeditation
   - murder, slay, hit, dispatch, bump off, off, remove
    
3. Complete eating all the food on one's plate or on the table
   "She polished off the remaining potatoes";
   - eat up, finish

Derived forms: polishes off, polished off, polishing off

Type of: complete, eat, finish, kill