1. Exhausted as a result of longtime stress
   "she was burnt-out before she was 30";
   - burned-out
    
2. Inoperative as a result of heat or friction
   "a burnt-out picture tube";
   - burned-out
    
3. Destroyed or badly damaged by fire
   "barricaded the street with burnt-out cars";
   - burned, burnt, burned-over, burned-out

See also: destroyed, tired, unserviceable