thousandth
Americannoun
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thousandths
plural
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a thousandth part, especially of one (1/1000).
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the thousandth member of a series.
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Also thousandth's place (in decimal notation) the position of the third digit to the right of the decimal point.
adjective
noun
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one of 1000 approximately equal parts of something
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( as modifier )
a thousandth part
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one of 1000 equal divisions of a particular scientific quantity
millivolt
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the fraction equal to one divided by 1000 ( 1/ 1000 )
Other Word Forms
Noun Inflected Forms
Etymology
Origin of thousandth
Vocabulary lists containing thousandth
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.
See Examples For:
"We are building the spaceport for the thousandth as much as the first launch," he said.
From BBC ● Sep. 8, 2026
Any parent who has read a “Berenstain Bears” book aloud under duress for the thousandth time will know what I mean.
From The Wall Street Journal ● Dec. 12, 2025
He was gifted with a superhuman taste sensitivity: He could easily distinguish a flavor at one ten thousandth of a gram in a fifteen ton batch.
From Salon ● Nov. 7, 2024
The official margin was a thousandth of a second — every bit as close as the Kentucky Derby a day earlier — and Buescher was left both dumbfounded and dejected.
From Seattle Times ● May 5, 2024
I swatted the air before my face for the twelve thousandth time that day and nodded at the opening.
From "A Walk in the Woods" by Bill Bryson
In some fusion systems, particles hotter than the core of the sun can become unstable within just a few thousandths of a second.
From Science Daily ● Sep. 6, 2026
That yielded speed improvements measured in milliseconds—or thousandths of a second.
From The Wall Street Journal ● Dec. 16, 2025
Timekeepers say they found a clear view for the 100 and checked below each image for an exact time down to the thousandths of a second.
From Los Angeles Times ● Aug. 5, 2024
Because of the simplicity of the 128-bit microchip, the robot runs on a mere 75 nanowatts—a couple thousandths as much power as is consumed by a modern pacemaker.
From Science Magazine ● Mar. 7, 2024
Over the next eighteen months, this indefatigable machine would produce two thousandths of a gram of plutonium, a quantity about the size of a grain of salt.
From "Big Science" by Michael Hiltzik
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.
