WordWeb Online

1. Happening unexpectedly
   "suddenly she felt a sharp pain in her side"
   - all of a sudden, of a sudden
    
2. Quickly and without warning
   "he stopped suddenly"
   - abruptly, short, dead
    
3. On impulse; without premeditation
   "he made up his mind suddenly"
   - on the spur of the moment

See also: sudden

Encyclopedia: Suddenly, Last Summer Suddenly Suddenly, tammy Suddenly, Tammy!