For use by adults; intended for adults (e.g., products, tickets, or services). Commonly seen on labels and descriptions.
この映画は大人用なので、子どもは入場できません。
This film is for adults, so children are not allowed to enter.
大人用のスリッパを一足ください。
Please give me one pair of adult slippers.
プレゼントは大人用のデザインを選んだ。
I chose a design intended for adults for the gift.