from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun The ordinal number matching the number 1,000 in a series.
  • noun One of 1,000 equal parts.

from The Century Dictionary.

  • Last in order of a series of a thousand; next after the nine hundred and ninety-ninth: an ordinal numeral.
  • Constituting one of a thousand equal parts into which anything is divided.
  • noun One of a thousand equal parts into which anything is divided.

from the GNU version of the Collaborative International Dictionary of English.

  • adjective Next in order after nine hundred and ninty-nine; coming last of a thousand successive individuals or units; -- the ordinal of thousand.
  • adjective Constituting, or being one of, a thousand equal parts into which anything is divided; the tenth of a hundredth.
  • adjective Occurring as being one of, or the last one of, a very great number; very small; minute; -- used hyperbolically.
  • noun The quotient of a unit divided by a thousand; one of a thousand equal parts into which a unit is divided.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • adjective The ordinal form of the number one thousand.
  • noun singular only The person or thing in the thousandth position.
  • noun One of a thousand equal parts of a whole.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • adjective the ordinal number of one thousand in counting order
  • noun position 1,000 in a countable series of things
  • noun one part in a thousand equal parts


Sorry, no etymologies found.


Help support Wordnik (and make this page ad-free) by adopting the word thousandth.


  • It is 0.5 thousandth, that is, half of a thousandth.


  • In an instant her mind learns so many things at once that if the imagination and intellect spent years in striving to enumerate them, it could not recall a thousandth part of them.

    The Interior Castle or The Mansions 1921

  • The term means "thousandth-part money," that is, the thousandth part of a _tael_ or Chinese ounce of silver, say one _cash_; and it was originally applied to a tax of one _cash_ per tael on all sales, said to have been voluntarily imposed on themselves by the people, as a temporary measure, with a view to make up the deficiency in the land-tax caused by the rebellion.

    China and the Manchus Herbert Allen Giles 1890

  • For they don't, else would the thousandth pipe of opium be provocative of similar delights to the first, else would one cocktail, instead of several, produce an equivalent glow after a year of cocktails.

    Chapter 30 2010

  • She wondered, for the thousandth time, what a windlute was; yet much of beauty, much of beyondness, she sensed of this dimly remembered beautiful mother of hers.

    CHAPTER VI 2010

  • “Anything is possible,” I said for perhaps the thousandth time in my life.

    The Bird House Kelly Simmons 2011

  • He studied his walk, his body movements, stripped him again and again and for the thousandth time made him flex all his muscles.


  • Also for the thousandth time, this is completely and utterly wrong.

    Matthew Yglesias » Corker Admits Affordable Care Act Won’t Be Repealed 2010

  • “I must not stay,” Graham reiterated for the thousandth time.


  • No need of memory when you roared it over and over for the thousandth time till half the inn was a-knock at the door to spit you for the sleep killer you were.

    Chapter 11 2010


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