fifth
Americanadjective
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next after the fourth; being the ordinal number for five.
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being one of five equal parts.
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Automotive. of, relating to, or operating at the gear transmission ratio at which the drive shaft speed is greater than that of fourth gear for a given engine crankshaft speed.
fifth gear.
adverb
noun
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a fifth part, especially of one (1/5).
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the fifth member of a series.
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a fifth part of a gallon of liquor or spirits; 4/5 (0.8) of a quart (about 750 milliliters).
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Automotive. fifth gear.
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Music.
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a tone on the fifth degree from another tone (counted as the first).
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the interval between such tones.
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the harmonic combination of such tones.
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idioms
adjective
noun
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one of five equal or nearly equal parts of an object, quantity, measurement, etc
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( as modifier )
a fifth part
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the fraction equal to one divided by five ( 1/ 5 )
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music
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the interval between one note and another five notes away from it counting inclusively along the diatonic scale
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one of two notes constituting such an interval in relation to the other See also perfect diminished interval
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an additional high gear fitted to some motor vehicles
adverb
Etymology
Origin of fifth
First recorded before 1000; earlier fift, Middle English fifte, Old English fīfta; -th by analogy with fourth, etc.
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
If Liverpool finish fifth, where they are now, the EPS passes to the Premier League's sixth-placed team.
From BBC • Apr. 8, 2026
As a result, elevated oil prices reflect more than just the Strait of Hormuz bottleneck, which usually handles a fifth of global oil supplies.
From The Wall Street Journal • Apr. 8, 2026
Iran later said it had agreed to safe passage in the Strait, through which a fifth of global oil and gas passes.
From Barron's • Apr. 8, 2026
Yoshinobu Yamamoto puts in another strong effort to lead the Dodgers to a 4-1 victory over the Blue Jays for their fifth straight win.
From Los Angeles Times • Apr. 8, 2026
By the time they were in fifth grade, Josie felt like she was drowning in them.
From "The School for Whatnots" by Margaret Peterson Haddix
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Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.