1. Never experiencing good luck: Mr. Smee experienced the unfortunate experience of losing a lot of money at the racetrack at the beginning of the racing season.
2. Accompanied by or bringing bad luck: Many people, including my friend Jack, believe that certain dates on the calendar are unfortunate dates and you should not try to do any important activities.
3. Not appropriate to a given situation: It was an unfortunate gaffe when Lucy's little girl started to giggle in the middle of the formal ceremony.