Come across (phrasal verb)

Macmillan dictionary describes 3 possible definitions of that phrasal verb:

1. to meet someone, or to find something by chance
2. if someone or something comes across in a particular way, you have a particular opinion of them when you meet them or see them
3. if something such as a feeling or idea comes across when you speak, you make it very clear to people

To meet someone, or to find something by chance

1. I come across Julie in subway.
2. Usually I come across good ideas while running.
3. I came across sales in Apple Store, so I bought a new phone.

Examples from movies:

1. Our house had been in Mama’s family, since her grandpa’s grandpa’s grandpa had come across the ocean about a thousand years ago. (Forest Gump / 00:06:56)
2. How often do you come across a three-headed dog? (Harry Potter and the Sorcerer’s Stone/ 01:46:44)

If someone or something comes across in a particular way, you have a particular opinion of them when you meet them or see them

1. He came across (came over) very well at the last interview.
2. That group come across as hard workers.
3. So far my iPod comes across as a best music player.