主(ぬし)head (of a household, etc.), leader, master, owner, proprietor, proprietress, subject (of a rumour, etc.), doer (of a deed), guardian spirit (e.g. long-resident beast, usu. with mystical powers), long-time resident (or employee, etc.), husband, you

警察(けいさつ)が落(お)とし物(もの)の主(ぬし)を探(さが)している。

The police are looking for the owner of the lost item. {head (of a household, etc.), leader, master, owner, proprietor, proprietress, subject (of a rumour, etc.), doer (of a deed), guardian spirit (e.g. long-resident beast, usu. with mystical powers), long-time resident (or employee, etc.), husband, you}

この沼(ぬま)の主(ぬし)は河童(かっぱ)だと言(い)われています。

It is said that the master of this swamp is a Kappa. {head (of a household, etc.), leader, master, owner, proprietor, proprietress, subject (of a rumour, etc.), doer (of a deed), guardian spirit (e.g. long-resident beast, usu. with mystical powers), long-time resident (or employee, etc.), husband, you}

頭(あたま)の中(なか)で鳴(な)り響(ひび)く声(こえ)の主(ぬし)は、私(わたし)自身(じしん)でした。

The master of the voice echoing in my head was myself. {head (of a household, etc.), leader, master, owner, proprietor, proprietress, subject (of a rumour, etc.), doer (of a deed), guardian spirit (e.g. long-resident beast, usu. with mystical powers), long-time resident (or employee, etc.), husband, you}

父(ちち)の死後(しご)、この家(いえ)の主(ぬし)が父(ちち)から私(わたし)に変(か)わることとなりました。

After my father's death, I became the head of this house, taking over from my father. {head (of a household, etc.), leader, master, owner, proprietor, proprietress, subject (of a rumour, etc.), doer (of a deed), guardian spirit (e.g. long-resident beast, usu. with mystical powers), long-time resident (or employee, etc.), husband, you}

家族(かぞく)は皆(みな)娘(むすめ)の言(い)いなりだから、この家(いえ)の主(ぬし)は娘(むすめ)と言(い)っても過言(かごん)ではない。

Since the family does everything the daughter says, it wouldn't be an exaggeration to say that she is the head of this household. {head (of a household, etc.), leader, master, owner, proprietor, proprietress, subject (of a rumour, etc.), doer (of a deed), guardian spirit (e.g. long-resident beast, usu. with mystical powers), long-time resident (or employee, etc.), husband, you}