eighth

American  

[aytth, ayth] / eɪtθ, eɪθ /

adjective

1. next after the seventh.

2. being one of eight equal parts.

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noun

• eighths
  plural

1. an eighth part, especially of one (⅛).

2. the eighth member of a series.

3. Music. octave.

adverb

1. in the eighth place; eighthly.

eighth British  

/ eɪtθ /

adjective

1. (usually prenominal)

   1. coming after the seventh and before the ninth in numbering or counting order, position, time, etc; being the ordinal number of eight: often written 8th

   2. ( as noun )

      the eighth in line

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noun

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

   2. ( as modifier )

      an eighth part

2. the fraction equal to one divided by eight ( 1/ 8 )

3. another word for octave

adverb

1. Also: eighthly. after the seventh person, position, event, etc

Other Word Forms

Noun Inflected Forms

• eighths
  plural

Etymology

Origin of eighth

before 1000; Middle English eightethe, Old English eahtotha; cognate with Old High German ahtoda, Old Norse āttandi, Gothic ahtud-. See eight, -th ²

Example Sentences

See Examples For:

eighth eighths

U.S.-resident trips to Canada increased 17.2% on-year to hit 1.8 million, an eighth straight increase.

From The Wall Street Journal ● Oct. 13, 2026

“Bearing in mind that the conflict around Iran has now entered its eighth month, the U.K. economy has shown impressive resilience,” he said.

From The Wall Street Journal ● Oct. 9, 2026

In the same rankings last year they were eighth with a mark of 15.47, only just above the threshold for Category A status.

From BBC ● Oct. 8, 2026

In fact, the good news for Tottenham fans is that the last time they were in this situation, they finished eighth.

From BBC ● Oct. 7, 2026

We’re only in eighth grade, but everyone knows she’s already picked out her first three college choices, her probable major and potential minor and the focus of her eventual graduate studies.

From "Liar, Liar" by Gary Paulsen

Trip jacket selection is an art and a science, best done elegantly, with attention paid to form, function, aesthetics and viability — as a pillow when folded into fourths or eighths on a long-haul flight.

From Los Angeles Times ● Apr. 19, 2024

But its rhythm is stiff: stolid 4/4 time, brass and piano playing even eighths with little variation.

From Slate ● Feb. 23, 2017

His times for the first, second and third eighths of a mile were 11.6, 22.1 and 36.6 seconds, respectively.

From Washington Post ● May 13, 2016

And so he was launched — not flying yet, still leaping in eighths of a mile, but with the wind beneath his cape.

From New York Times ● Jul. 6, 2012

Soon, Howard had a little track of three eighths of a mile cut out of the flat valley land.

From "Seabiscuit: An American Legend" by Laura Hillenbrand