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

Jim Walton’s net worth as of March 31 was $146 billion, ranking him the eighth wealthiest billionaire in the world, while Rob Walton’s net worth was $143 billion, ranking him No. 10, Bloomberg said.

From Barron's • Apr. 1, 2026

The call ended the eighth inning with two runners on base and the Red Sox trailing by one run.

From Los Angeles Times • Apr. 1, 2026

But now the Canadian top flight will have a different set of eyes on it as it enters its eighth season.

From BBC • Mar. 31, 2026

For the eighth consecutive month, inflation outpaced national home price appreciation, with CPI running 1.5 percentage points above the 0.9% annual gain-leaving real home values modestly lower year over year, the survey said.

From The Wall Street Journal • Mar. 31, 2026

A few minutes later, we turn into a neighborhood where some kids who definitely look like eighth graders get on and go straight to the back of the bus.

From "How to Disappear Completely" by Ali Standish