Verb (5-dan, う, intransitive)
1. to pass (by) each other; to brush past
すれ違う人々も様々だ。The people passing by are also diverse.
2. to miss (meeting) each other; to fail to meet
でも、ここで待っていてくれたのですれ違わずに済みました。But, because you waited for me here, we didn't miss each other.
3. to be at odds; to clash; to be in conflict