An unexpected meeting or chance coincidence—encountering someone by chance.
昨日、昔の先生に奇遇にも駅で会った。
Yesterday I unexpectedly ran into my old teacher at the station.
こんな場所で君に会うとは本当に奇遇だね。
What a coincidence to meet you in a place like this.
彼らが同じ会社に入ったのは奇遇と言える。
It can be called a coincidence that they joined the same company.