eleventh

American  

[ih-lev-uhnth] / ɪˈlɛv ənθ /

adjective

1. next after the tenth; being the ordinal number for 11.

2. being one of 11 equal parts.

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noun

1. an eleventh part, especially of one (1/11).

2. the eleventh member of a series.

eleventh British  

/ ɪˈlɛvənθ /

adjective

1. (usually prenominal)

   1. coming after the tenth in numbering or counting order, position, time, etc; being the ordinal number of eleven: often written 11th

   2. ( as pronoun )

      the eleventh in succession

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noun

1. 1. one of 11 equal or nearly equal parts of an object, quantity, measurement, etc

   2. ( as modifier )

      an eleventh part

2. the fraction equal to one divided by 11 ( 1/ 11 )

3. music

   1. an interval of one octave plus one fourth

   2. See eleventh chord

Etymology

Origin of eleventh

before 1000; Middle English enleventh, enlefte, Old English endlyfta (akin to Old Frisian andlofta, Old Saxon ellifto ). See eleven, -th ²

Example Sentences

Oil futures took another swift dive on Tuesday as world leaders consider releasing emergency supplies as the Iran conflict stretched into an eleventh day.

From MarketWatch • Mar. 10, 2026

"My mum cancelled making Nicola’s dress in the eleventh hour despite how excited she was to wear her design, forcing her to urgently find a new dress."

From Barron's • Jan. 20, 2026

An eleventh person went to the hospital later.

From BBC • Nov. 4, 2025

At the eleventh hour, the White House named Essayli as acting U.S. attorney, allowing him to hold the post for 210 more days without confirmation hearings.

From Los Angeles Times • Aug. 29, 2025

She was sixteen and going into the eleventh grade.

From "The Lions of Little Rock" by Kristin Levine