thirtieth

[ thur-tee-ith ]

/ ˈθɜr ti ɪθ /

adjective

next after the twenty-ninth; being the ordinal number for 30.

being one of 30 equal parts.

noun

a thirtieth part, especially of one (1/30).

the thirtieth member of a series.

Nearby words

Origin of thirtieth

before 900; thirty + -eth²; replacing Middle English thrittythe, Old English thrītegtha

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for thirtieth

Thirtieth week, child does not look after objects let fall .
The Mind of the Child, Part II|W. Preyer
On the thirtieth, we made St. Marys, being the northern cape at the entrance of the river.
Embassy to the Eastern Courts of Cochin-China, Siam, and Muscat|Edmund Roberts
The eve of May thirtieth was spent in camp a few miles from Woodbine.
On a Donkey's Hurricane Deck|R. Pitcher Woodward
The present flotilla arrived on Sunday, the thirtieth, and remained only an hour.
Historic Highways of America (Vol. 14)|Archer Butler Hulbert

The thirtieth and last praçna of the great Kalpa Sūtra of Āpastamba is a treatise of this class.
A History of Sanskrit Literature|Arthur A. MacDonell

British Dictionary definitions for thirtieth

thirtieth

/ (ˈθɜːtɪɪθ) /

adjective

(usually prenominal)

being the ordinal number of thirty in counting order, position, time, etc: often written 30th
(as noun)the thirtieth of the month

noun

one of 30 approximately equal parts of something
(as modifier)a thirtieth part

the fraction equal to one divided by 30 (1/30)

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for thirtieth

thirtieth

Middle English threttyth, from Old English þritigoða; see thirty + -th (1). Respelled 16c. to conform to new spelling of thirty.