1. An unfortunate state resulting from unfavourable outcomes
   "It was bad luck that his car broke down on the way to the job interview";
   - misfortune, tough luck, ill luck
    
2. An unpredictable outcome that is unfortunate
   "if I didn't have bad luck, I wouldn't have any luck at all";
   - mischance, mishap
    
3. Unnecessary and unforeseen trouble resulting from an unfortunate event
   "His bad luck continued as he lost his wallet the next day";
   - misfortune

1. Expression of sympathy, commiserations or regret on a bad outcome
   - hard luck [informal], tough luck [informal], rotten luck [informal], worse luck [informal]

Type of: chance, circs [Brit, informal], circumstances, destiny, fate, fortune, hazard, lot, luck, portion, trouble

Encyclopedia: Bad luck