From WordNet (r) 3.0 (2006):
come on
v 1: appear or become visible; make a showing; "She turned up at
the funeral"; "I hope the list key is going to surface
again" [syn: come on, come out, turn up, surface,
show up]
2: move towards; "We were approaching our destination"; "They
are drawing near"; "The enemy army came nearer and nearer"
[syn: approach, near, come on, go up, draw near,
draw close, come near]
3: develop in a positive way; "He progressed well in school";
"My plants are coming along"; "Plans are shaping up" [syn:
progress, come on, come along, advance, get on,
get along, shape up] [ant: regress, retrograde,
retrogress]
4: start running, functioning, or operating; "the lights went
on"; "the computer came up" [syn: go on, come up, come
on] [ant: go off]
5: occur or become available; "water or electricity came on
again after the earthquake"