1 If a fashion or a product comes in, it becomes available or becomes popular. -- yeniden moda/gündemde/elde edilebilir olmak
Flared trousers came in during the seventies.
2 If news, information, a report, etc comes in, it is received. -- almak, ele geçmek, alınmak, ulaşmak, gelmek
News is just coming in about the explosion.
3 If the tide (= regular change in the level of the sea) comes in, the sea moves towards the beach or coast. -- denizde dalga sahile varmak/gelmek
4 used to describe how someone is involved in a situation, story, or plan -- ... de/da rolü olmak, yeri olmak, devreye girmek, parmağı olmak