noun
woman who was beautiful in her youth; faded beauty
Refers to a woman who retains traces of her former beauty despite age. Often used in a poetic or slightly old-fashioned way, comparing her to a cherry tree that blooms even after losing its leaves.
彼女は若い頃は評判の美人で、今もなお姥桜の趣がある。
She was a celebrated beauty in her youth, and even now she has the charm of a faded beauty.
Compound of 姥 (uba, 'old woman') and 桜 (sakura, 'cherry tree'). The metaphor likens an aging but still attractive woman to a cherry tree that blooms beautifully even when old.