thousandth

UK:**UK and possibly other pronunciationsUK and possibly other pronunciations/ˈθaʊzənθ/US:USA pronunciation: respellingUSA pronunciation: respelling(thou′zəndth, -zəntth, -zənth)


WordReference Random House Unabridged Dictionary of American English © 2026
thou•sandth  (thou′zəndth, -zəntth, -zənth),USA pronunciation adj. 
  1. last in order of a series of a thousand.
  2. being one of a thousand equal parts.

n. 
  1. a thousandth part, esp. of one (1/1000).
  2. the thousandth member of a series.
  3. MathematicsAlso, thou′sandth's place′. (in decimal notation) the position of the third digit to the right of the decimal point.
  • thousand + -th2 1545–55

Collins Concise English Dictionary © HarperCollins Publishers::
thousandth /ˈθaʊzənθ/ adj
  1. (usually prenominal)
    • being the ordinal number of 1000 in numbering or counting order, position, time, etc
    • (as noun): the thousandth in succession
 n
    • one of 1000 approximately equal parts of something
    • (as modifier): a thousandth part
  2. one of 1000 equal divisions of a particular scientific quantity: millivolt
    Related prefix: milli-
  3. the fraction equal to one divided by 1000 ( 1⁄1000)
WordReference Random House Learner's Dictionary of American English © 2026
thou•sand /ˈθaʊzənd/USA pronunciation   n., pl. -sands, (as after a numeral) -sand, adj. 
n. [countable]
  1. a cardinal number, 10 times 100.
  2. a symbol for this number, as 1000 or M.
  3. a set of this many persons or things.
  4. Mathematics thousands:
    • the numbers between 1000 and 999,999, as in referring to money.
    • a great number or amount:Thousands came to see him at his first concert.
  5. Also called ˈthou•sand's ˌplace. 
    • Mathematics(in a mixed number) the position of the fourth digit to the left of the decimal point.
    • Mathematics(in a whole number) the position of the fourth digit from the right.

adj. 
  1. amounting to 1000 in number.
thou•sandth, adj. 
    See hundred.
WordReference Random House Unabridged Dictionary of American English © 2026
thou•sand  (thou′zənd),USA pronunciation n., pl. -sands, (as after a numeral) -sand, adj. 
n. 
  1. a cardinal number, 10 times 100.
  2. a symbol for this number, as 1000 or M.
  3. Mathematics thousands. the numbers between 1000 and 999,999, as in referring to an amount of money:Property damage was in the thousands.
  4. a great number or amount.
  5. Also, thou′sand's place′. 
    • Mathematics(in a mixed number) the position of the fourth digit to the left of the decimal point.
    • Mathematics(in a whole number) the position of the fourth digit from the right.

adj. 
  1. amounting to 1000 in number.
  • bef. 900; Middle English; Old English thūsend; cognate with Dutch duizend, Old High German dūsunt, Old Norse thūsund, Gothic thūsindi

'thousandth' also found in these entries (note: many are not synonyms or translations):
dirham - gram - mil - millesimal - milligram - millilitre - millimetre - millisecond - -th - thou - apostilb - bimillennium - mill - millennium - milli- - milliampere - millibar - millibarn - millicurie - millidegree - millieme - millifarad - milligal - millihenry - millilambert - milliliter - millilux - millime - millimeter - millimicron - millimole - milliradian - millirem - milliroentgen - millivolt - milliwatt - prutah - rin

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