come-on (Noun) — Anything that serves as an enticement.
come-on (Noun) — Qualities that attract by seeming to promise some kind of reward.
come-on (Verb) — Appear or become visible; make a showing.
come-on (Verb) — Move towards.
come-on (Verb) — Make progress in knowledge or status.
come-on (Verb) — Start running, functioning, or operating. ex. "the lights came on"
come-on (Verb) — Occur or become available. ex. "water or electricity came on again after the earthquake"
come-on (Interjection) — Expression of encouragement. ex. "Come on! You can still win"
come-on (Interjection) — Expression of disbelief. ex. "come on! You must be joking"
come-on (Interjection) — Exclamation to tell someone to be quicker.