1. a long, loose outer garment:

｟主に米｠ (部屋着の)ガウン; ベビーローブ

e.g. a young man in a fez and ragged robe

e.g. a baby in christening robes.

(often robes) a long, loose garment worn on formal or ceremonial occasions as an indication of the wearer's office or profession:

｟かたく｠ ; 〖しばしば～s〗 (長くゆったりした)礼服, 式服; 官服〘裁判官･司教などが平服の上にまとう〙

e.g. he was dressed in his archbishop's robes after some function.

a dressing gown or bathrobe.

バスローブ(bathrobe, ｟主に英｠ dressing gown)

2. North American dated a small blanket; lap robe.

｟米｠ 膝掛け(lap robe)

verb with object

clothe in a robe or long, loose outer garment:

…にガウン［礼服］を着せる; ｟かたく｠ ; 〖be ～d in A〗 〈人が〉Aを着ている; 〖～ oneself〗 ガウン［礼服］をまとう.

e.g. the Chamberlain robed the king on coronation day.

no object put on robes, especially for a formal or ceremonial occasion:

ガウン［礼服］をまとう

e.g. I went into the vestry and robed for the Mass.

Middle English: from Old French, from the Germanic base (in the sense ‘booty’) of rob (because clothing was an important component of booty).