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 are hunting their eighth successive Women's Six Nations title, but are attempting to maintain their streak without a host of names who helped them to the World Cup last year.

From BBC • Apr. 16, 2026

The people who gather in this small room on the eighth floor of the New York Stock Exchange look like a group of middle-aged caffeine addicts.

From The Wall Street Journal • Apr. 15, 2026

That is why, in his eighth decade, McKechnie remains a master of the relentless world he inhabits.

From BBC • Apr. 14, 2026

“It was tricky. I was moving fast, clipped the eighth hurdler and lost my balance. That’s never happened to me before.”

From Los Angeles Times • Apr. 13, 2026

In 4/4 or 2/4 time, microbeats would be represented by the eighth notes, while in 3/4 time microbeats would be represented by the quarter notes.

From "Music and the Child" by Natalie Sarrazin