thirty
num. · n.-
1 the number 30 (num.) A1 Beginnerthe number 30.
the cardinal number occurring after twenty-nine and before thirty-one.
ExampleThere are thirty days in the month of September.
ExampleThe research team spent thirty days collecting samples from the remote site before returning to the laboratory for analysis.
-
2 the age of 30 (n.) A2 Elementarythe age of thirty years old.
the specific age of thirty years; often used in the plural to refer to the decade of a person's life.
ExampleShe decided to change her career when she turned thirty.
ExampleMany professionals experience a significant shift in their career goals as they approach thirty and seek greater stability.
Show 2 more sensesShow fewer
-
3 a 30-second advert (n.) C1 Advanced Technicala television or radio advertisement that lasts for thirty seconds.
a commercial broadcast lasting exactly thirty seconds.
ExampleThe company paid a lot of money for a thirty during the big game.
ExampleThe marketing agency focused on producing a high-impact thirty that would capture the audience's attention during the prime-time broadcast.
-
4 a pack of 30 beers (n.) C2 Proficiency American English Slang Informala large box containing thirty cans or bottles of beer.
a pack or 'rack' containing thirty units of beer.
ExampleHe picked up a thirty on his way to the party.
ExampleThe students arrived at the beach house with a thirty of cheap lager, prepared for the weekend celebrations.
- thirty pack
From Middle English thirty, metathetic alternant of Middle English thriti, þrittiȝ, from Old English þrītiġ (“thirty”), from Proto-Germanic *þrīz tigiwiz (“thirty”, literally “three tens”), equivalent to three + -ty. Cognate with Scots therty, tretty (“thirty”), West Frisian tritich (“thirty”), Dutch dertig (“thirty”), German dreißig (“thirty”).