Definition of "hit on"

hit on

verb
third-person singular simple present hits on, present participle hitting on, simple past and past participle hit on
1. (transitive, slang) To flirt with; to approach and speak to (someone), seeking romance, love, sex, etc.
  Quotations
  Don Iguan: I have slithered the world over in search of beauty such as yours! Perhaps you'd like to come back to my lair this evening. I'll light some candles... put on some beetle music... Mom: I'm married. Go hit on your sister.
  2003 September 23, Bill Amend, FoxTrot (comic)
  Anne watched as he put an arm around one of the bridesmaids and gave her a decidedly ungrandfatherly squeeze while attempting to look down her dress, then proceeded to hit on the mother of the groom.
  2015, Sheila Roberts, A Wedding on Primrose Street, MIRA, page 181
2. (transitive, idiomatic) To discover, pinpoint; to think up; to realize.
3. Used other than figuratively or idiomatically: see hit,‎ on.
  Quotations
  He was hit on his head so strongly that he stumbled forward and then he was severely hit from several sides.
  1996, Global Journal on Human Rights Law, page 210