thirty

A2 · Elementary Uncountable noun

n. the age of thirty years old.

n. the specific age of thirty years; often used in the plural to refer to the decade of a person's life.

“She decided to change her career when she turned thirty.”

“Many professionals experience a significant shift in their career goals as they approach thirty and seek greater stability.”

C1 · Advanced Countable noun Technical

n. a television or radio advertisement that lasts for thirty seconds.

n. a commercial broadcast lasting exactly thirty seconds.

“The company paid a lot of money for a thirty during the big game.”

“The marketing agency focused on producing a high-impact thirty that would capture the audience's attention during the prime-time broadcast.”

C2 · Proficiency Countable noun American English · Slang · Informal

n. a large box containing thirty cans or bottles of beer.

n. a pack or 'rack' containing thirty units of beer.

“He picked up a thirty on his way to the party.”

“The students arrived at the beach house with a thirty of cheap lager, prepared for the weekend celebrations.”