WordWeb Online

1. With ease ('easy' is sometimes used informally for 'easily')
   "she was easily excited"; "was easily confused"; "he won easily"; "this china breaks very easily"
   - easy
    
2. Without question
   "easily the best book she's written"
    
3. Indicating high probability; in all likelihood
   "a mistake that could easily have ended in disaster"
   - well

See also: easy

Encyclopedia: Easily