1. 〔持って来るのを忘れた物〕a thing left behind;〔遺失物〕a lost article
    • 家に忘れ物をして来た
    • When I left home, there was something I forgot to bring.
    • 電車に傘の忘れ物が多い
    • There are many umbrellas left in trains.
    • 忘れ物はないか
    • Have you got everything?/Are you sure you haven't forgotten anything?
    • 持ち主の分からない忘れ物
    • an unclaimed lost article