eighth

American  

[eytth, eyth] / eɪtθ, eɪθ /

adjective

1. next after the seventh.

2. being one of eight equal parts.

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noun

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

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

England combined nerve and accuracy to overcome France and a raucous record crowd to clinch their eighth successive Women's Six Nations title in Bordeaux.

From BBC • May 17, 2026

This week marks the eighth anniversary of the landmark Supreme Court ruling that struck down the Professional and Amateur Sports Protection Act and allowed states to begin legislating sports betting.

From MarketWatch • May 15, 2026

Royal 4, El Modena 3: A two-run walk-off double by Matthew Stout in the eighth inning gave Royal the victory.

From Los Angeles Times • May 15, 2026

But since he joined, Everton have not finished higher than eighth in the Premier League and they are in danger of missing out on European football for an eighth successive season.

From BBC • May 15, 2026

Andrew Yee, an eighth grader whose mother works with Dad at the dinosaur dig, takes my arm and starts leading me out of the atrium.

From "Linked" by Gordon Korman