[come on] vi (15c) 1 a: to advance by degrees "darkness came on" b: to begin by degrees "rain came on toward noon"
2. a: please--used in cajoling or pleading b--used interjectionally to express astonishment, incredulity, or recognition of a put-on
3: to project an indicated personal image "comes on as a conservative"
4: to show sexual interest in someone; also: to make sexual advances "tried to come on to her"