fall asleep 2022.12.06 fall asleepとは 意味・定義・例文 Phrasal verbs 句動詞 1. start to sleep 眠る The baby yawned and fell asleep. fall asleep 2022.12.06 fall asleepとは 意味・定義・例文 Idioms 1. start sleeping 寝入る, 眠りに落ちる She fell asleep at once.