third
Americanadjective
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next after the second; being the ordinal number for three.
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being one of three 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 second gear for a given engine crankshaft speed, but not as great as that of fourth gear, if such exists.
third gear.
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rated, graded, or ranked one level below the second.
He's third engineer on the ship.
noun
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a third part, especially of one (1/3).
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the third member of a series.
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Automotive. third gear.
Don't try to start a car when it's in third.
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a person or thing next after second in rank, precedence, order.
The writer of the best essay will receive a gold medal, the second a silver, and the third a bronze.
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Law. Usually thirds
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the third part of the personal property of a deceased husband, which in certain circumstances goes absolutely to the widow.
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a widow's dower.
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Music.
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a tone on the third degree from a given 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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Baseball. third base.
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Commerce. Usually thirds. a product or goods below second quality.
adverb
adjective
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coming after the second and preceding the fourth in numbering or counting order, position, time, etc; being the ordinal number of three: often written 3rd
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( as noun )
he arrives on the third
the third got a prize
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rated, graded, or ranked below the second level
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denoting the third from lowest forward ratio of a gearbox in a motor vehicle
noun
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one of three equal or nearly equal parts of an object, quantity, etc
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( as modifier )
a third part
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the fraction equal to one divided by three ( 1/ 3 )
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the forward ratio above second of a gearbox in a motor vehicle. In some vehicles it is the top gear
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Full term: third class honours degree. an honours degree of the third and usually the lowest class
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(plural) goods of a standard lower than that of seconds
adverb
Other Word Forms
Derived Forms
Etymology
Origin of third
before 900; Middle English thirde, Old English (north) thirda, variant of thridda; cognate with Dutch derde, German dritte, Old Norse thrithi, Gothic thridja, Greek trítos, Latin tertius, Sanskrit tṛtīya. See three
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.
In the campaign’s final weeks, Raman and Pratt — who have traded second and third place in various polls — went after each other with fury.
From Los Angeles Times • Jun. 3, 2026
Raising the cash rate to 4.35% last month, the RBA said the third straight interest-rate increase would give it time to weigh the Iran conflict’s impact on the local economy.
From The Wall Street Journal • Jun. 3, 2026
Wall Street sees the company using about $220 million in cash in the second, third, and fourth quarters combined.
From Barron's • Jun. 2, 2026
However, spring was extremely dry in parts of southern and eastern England where some areas only got around a quarter to a third of their expected rainfall.
From BBC • Jun. 2, 2026
“Gay, you take this one and go for a third run.”
From "The Red Car to Hollywood" by Jennie Liu
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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.