1To meet someone by chance; to happen upon someone or something unexpectedly.
駅で高校の同級生に行き会って、久しぶりに食事をした。
I met a high school classmate by chance at the station and we had a meal after a long time.
古い友人と旅行先で行き会うとは思わなかった。
I didn't expect to run into an old friend at the travel destination.
夜道で野生動物と行き会うことがあるので注意した方がいい。
You should be careful because you might encounter wild animals on roads at night.