From Longman Dictionary of Contemporary Englishcome on to somebody/something phrasal verb1 START DOING somethingto start talking about a new subject I’ll come on to this question in a few moments.2 informalATTRACTED TO somebody if someone comes on to another person, they make it very clear that they are sexually interested in them → come-on The way she was coming on to Jack, I’m amazed he managed to get out alive! → come→ See Verb table
Examples from the Corpus
come on to • Axel shows off at a gay disco, then runs off when somebody comes on to him.• He wants men to come on to me. 