To Come On

1. Used other than with a figurative or idiomatic meaning
2. (transitive) To encounter, discover; to come upon.
3. (intransitive) To appear on a stage or in a performance.
4. (intransitive) To appear on a television broadcast.
5. (intransitive) To progress, to develop.
6. (intransitive, of a light) To start to shine, become lit.
7. (intransitive, idiomatic, with to) To show sexual or relational interest through words or sometimes actions.
8. (intransitive, idiomatic, colloquial, Britain) To get one's period, start menstruating.
9. (sports, of a substitute) To enter the playing field.
10. (intransitive, informal, with adverbial words such as in, by, round, over, up, down) Elaboration of come (in the sense of move towards the speaker or other focus), emphasising motion or progress, or conveying a nuance of familiarity or encouragement.