noun
one person; one customer
Polite expression used by businesses to refer to a single customer or guest, often seen in signs, menus, and reservation systems.
お一人様につき、一品のご注文をお願いします。
Please order at least one item per person.
お一人様でのご来店も大歓迎です。
We warmly welcome customers coming alone as well.
noun
unmarried and childless older woman
Colloquial, sometimes self-deprecating or mildly derogatory term for a woman past typical marriage age who is single and without children. Compare 負け犬.
See also: 負け犬
彼女は自分をお一人様と笑って言うことがある。
She sometimes jokingly calls herself an 'ohitorisama' (unmarried older woman).