adult

/əˈdʌlt/noun

Someone who is old enough to be legally considered grown up.

Example sentences

“Tickets cost less for children than for adults.”
“Every child on the school trip must be accompanied by an adult.”

As an adjective it can be a euphemism: "adult content" means sexually explicit, not simply grown-up.

Synonyms for adult

grown-up

Antonyms

child
minor

On the Academic Word List. Find it in: Academic vocabulary.

Related words

kidA child or young person; informally, it can also refer to a young adult.elderAn older, respected member of a community or tribe who is looked to for advice, guidance, or ceremonial duties.teenagerA young person aged from thirteen to nineteen.ancestorA family member from past generations, on either parent's side, from whom a person is descended.toddlerA small child, usually between one and three years old, who can walk but is still a bit unsteady on their feet.generationAll the people born around the same time, who often share similar experiences and culture.