WordWeb Online

1. Support and strengthen
   "bolster morale";
   - bolster up
    
2. Prop up with a pillow or bolster
    
3. Add padding to
   "bolster the seat of the chair";
   - pad

1. A pillow that is often put across a bed underneath the regular pillows
   - long pillow

Derived forms: bolsters, bolstering, bolstered

Type of: fill, fill up, pillow, prop, prop up, reenforce, reinforce, shore, shore up

Encyclopedia: Bolster, Washington