1. Start running, functioning, or operating
   "the lights came on";
   - go on, come up
    
2. Improve in performance or condition; develop and move forward
   "The young athlete was really coming on in his training";
   - progress, come along, advance, get on, get along, shape up
    
3. Occur or become available
   "water or electricity came on again after the earthquake"
    
4. Move towards
   "They cheered up immensely as they came on home";
   - approach, near, draw near, draw close, come near
    
5. [informal] Make sexual advances
   "He was coming on to her at the party"

1. Expression of encouragement
   "Come on! You can still win";
   - c'mon [informal]
    
2. Expression of disbelief
   "come on! You must be joking";
   - come off it [informal], c'mon [informal], my foot [informal]
    
3. Exclamation to tell someone to be quicker
   "come on! We're going to be late for the movie";
   - chop-chop [informal], buck up [informal], hurry up, c'mon [informal], get a move on [informal]

1. Anything that serves as an enticement
   "The store used free samples as a come-on";
   - bait, hook, lure, sweetener
    
2. Qualities that attract by seeming to promise some kind of reward
   "The come-on of free gifts was used to attract customers";
   - lure, enticement

Derived forms: coming on, came on, come-ons, comes on, come on

Type of: attraction, attractiveness, begin, come, come up, develop, enticement, get, get down, get going, go, set about, set out, start, start out, temptation

Antonym: go off

Encyclopedia: Come on, Come on