- a cardinal number, 10 times 3.
- a symbol for this number, as 30 or XXX.
- a set of this many persons or things.
- Printing, Journalism. 30-dash.
- thirties, the numbers, years, degrees, or the like, from 30 through 39, as in referring to numbered streets, indicating the years of a lifetime or of a century, or referring to degrees of temperature: He works in the East Thirties. She must be in her thirties. The temperature was in the thirties yesterday.
- amounting to 30 in number.
Origin of thirty
Examples from the Web for thirties
One minute the script, the next a story about Ivor Novello's tailor or the Tahiti steamer schedule in the Thirties.Alfred Hitchcock’s Fade to Black: The Great Director’s Final Days
December 13, 2014
Now in his early thirties, his cheeks are sunken from smoking too much hash.Obama’s Deadly Informants: The Drone Spotters of Pakistan
Umar Farooq, Syed Fakhar Kakakhel
November 12, 2014
You're Mrs. Jim Palmer' . . . people in their thirties sometimes want to change the course of the ship.Will the Real Jim Palmer Please Stand Up
September 27, 2014
While in his thirties, he had an affair with the same 15-year-old girl whose body has recently been discovered buried in his yard.This Week’s Hot Reads: May 26, 2014
May 28, 2014
Either one describes the bouts of anxiety single guys in their thirties feel about their marital status.High Manxiety: Thirtysomething Men Are The New Neurotic Singles
May 4, 2014
Oh, sure, we were in our thirties, but who would have suspected that?The Man the Martians Made
Frank Belknap Long
These may be of any age from eighty odd to the bitter thirties.Another Sheaf
He was much younger than middle-aged, really—somewhere in his thirties.Ten From Infinity
Paul W. Fairman
A tall, fair man still in his thirties, had stopped and raised his hat.The Mask
This was frontier when we came here in the thirties; we belong here.Winning the Wilderness
Margaret Hill McCarter
- the cardinal number that is the product of ten and threeSee also number (def. 1)
- a numeral, 30, XXX, etc, representing this number
- (plural) the numbers 30–39, esp the 30th to the 39th year of a person's life or of a century
- the amount or quantity that is three times as big as ten
- something representing, represented by, or consisting of 30 units
- amounting to thirtythirty trees
- (as pronoun)thirty are broken
Word Origin and History for thirties
1827 as the years of someone's life between 30 and 39; 1830 as a decade of years in a given century. See thirty.
early 15c. metathesis of Old English þritig, from þri, þreo "three" + -tig "group of ten" (see -ty (1)). Cf. Old Frisian thritich, Old Saxon thritig, Dutch dertig, Old High German drizzug, German dreissig. Thirty Years' War (1842) was a religious power struggle waged 1618-48, mainly on German soil. The symbol -30- as printer and telegrapher's code to indicate the last sheet or line of copy or a dispatch is recorded from 1895. In 20c. jargon of journalism, it came to be a traditional sign-off signal and slang word for "the end."