プログレッシブ和英中辞典(第4版)の解説
るすばん【留守番】
a person who stays at home to look after the house
彼女に留守番は任せられない
I cannot trust her to 「look after [take charge of] my house during [in] my absence.
母が留守番をすることになっている
My mother is to stay at home (to look after things).
留守番電話
an answering [a telephone answering] machine
彼の留守番電話に用件を吹き込んだ
I left [recorded] a message on his answering machine.
留守番電話取り次ぎ請け負い業
《米》 an answering service