Definition from Wiktionary, the free dictionary
- (transitive, idiomatic) To flirt with; to approach and speak to (someone), seeking romance, love, sex, etc.
- That's the third guy that has hit on her tonight.
- Guys are hitting on them almost all the time.
- (transitive, idiomatic) To discover, pinpoint; to think up; to realize; to invent.
- He hit on a great idea for improving the design.
to approach somebody seeking love, sex, etc.