adult · noun C /əˈdʌlt/Full view
adult
A1 a person or animal that has grown to full size and strength
Dictionary example:

Adults pay an admission charge but children get in free.

Learner example:

Dear Jo, The class day is Wednesday for children (8-16[s]) and Tuesday for adults. (Key English Test; A2; Catalan)

adult · adjective always before noun /əˈdʌlt/
adult (FOR ADULTS)
A2 for or relating to adults
Dictionary examples:

adult education

She spent most of her adult life in prison.

Learner example:

[After the wedding,] we go to a restaurant to celebrate. There are two t[y]pes of menu, the adult one, and [the one] for the children. (Preliminary English Test; B1; Spanish)

adult (NOT A CHILD)
C1 having finished growing
Dictionary example:

an adult male rat

Learner example:

Tony Soprano is the bad kid [in] every adult male. (Certificate in Advanced English; C1; Romanian)

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