na-adjective, noun which may take the genitive case particle 'no', noun
unexpected meeting; coincidence
Used when meeting someone by chance, often with a sense of pleasant surprise. Commonly appears in phrases like 奇遇ですね (What a coincidence!).
こんな所で会うとは奇遇ですね。
What a coincidence meeting you here!
彼と同じホテルに泊まっているとは奇遇だ。
It's a coincidence that I'm staying at the same hotel as him.