thirtieth

[ thur-tee-ith ]

adjective

1. next after the twenty-ninth; being the ordinal number for 30.
2. being one of 30 equal parts.

noun

1. a thirtieth part, especially of one (1/30).
2. the thirtieth member of a series.

ˈthirtieth

/ ˈθɜːtɪɪθ /

adjective

1. usually prenominal
   1. being the ordinal number of thirty in counting order, position, time, etc: often written 30th
   2. ( as noun )

      the thirtieth of the month

noun

1. 1. one of 30 approximately equal parts of something
   2. ( as modifier )

      a thirtieth part

2. the fraction equal to one divided by 30 ( 1 30 )

Word History and Origins

Origin of thirtieth¹

before 900; thirty + -eth ²; replacing Middle English thrittythe, Old English thrītegtha

Example Sentences

Another minister arose; a man not yet in his thirtieth year, his form stooped, as beneath the weight of sixty winters.

From Project Gutenberg

Given at our palace of Hampton Court, the 24th day of July, 1679, and in the one and thirtieth year of our reign.

From Project Gutenberg

The reference is to the thirtieth chapter of Jeremiah, from which an extract is here made at length.

From Project Gutenberg

He continued to linger till the thirtieth, when he calmly expired, in the sixty-second year of his age.

From Project Gutenberg

At Thirtieth Street he got off the car and walked west to Silver's place.

From Project Gutenberg