run into, come across, encounter
明日我々は敵軍に出くわすだろう。
Tomorrow, we will encounter the enemy forces.
ファン達は有名人と出くわすなり、彼にサインを求めた。
As soon as the fans ran into the celebrity, they asked him for autographs.
あれと出くわすとやっかいなんだ
It's a real pain when you run into one of those.
— Arrietty (2010)
仕事中に警官と出くわすのはかなりヤバいことだ
Running into a police officer while on the job is pretty serious.
— M - Eine Stadt sucht einen Mörder (1931)
何回も出くわすなんてとても奇妙ね
It’s really strange that we keep running into each other.
— ラ・ラ・ランド (2016)