ワンナイトラブ LinksSentence search for ワンナイトラブSentence search for ワンナイト・ラブEdit in JMdict Noun1. single sexual encounter; one-night standWasei, word made in Japan, From English “one night love”. Wasei (word made in Japan)Other formsワンナイト・ラブ Discussions Log in to talk about this word.