General meaning of 'adult' as opposed to child; used for mature content, behavior, or target audience.
This movie has adult-oriented content.
彼はアダルトな雰囲気を持っている。
He has a mature, adult air about him.
pornographic; explicit; X-rated
Euphemistic use for sexually explicit material; common in phrases like アダルトビデオ (adult video) or アダルトサイト (adult site).
アダルトサイトへのアクセスを制限する。
Restrict access to adult websites.
person recently turned 20
young adult
sex shop; adult shop
adult content; pornographic material
adult child; adult children; adult survivor of a dysfunctional family
glossy sex magazine
adult education