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From Old English hundendleftig (also spelled hund-endleofantig, hund-endlyftig, and hund-ælleftig). Popularized in the 20th century by J. R. R. Tolkien's The Lord of the Rings trilogy.



  1. (humorous) The number 110, 11 × 10.
    Compounds with other numerals: eleventy-one (= 111), eleventy-six (= 116), eleventy-first (= one-hundred and eleventh), etc.
    1955 (1974), JRR Tolkien, The Fellowship of the Ring, page 43, 54:
    [Bilbo] announced that he would shortly be celebrating his eleventy-first birthday
    “Today is my one hundred and eleventh birthday: I am eleventy-one today!”
    1980, Janet Caudle, State and Interstate Fishery Jurisdiction: Problems and Progress : Proceedings of a Conference in Raleigh, North Carolina, 1979 : October 29-31, 1979, page 149:
    without having to go back through the thousand and eleventy-three days to alter the plan
    2004, J. Michael Straczynski, The Lurker's Guide to Babylon 5: The Quality of Mercy[1]:
    Minbari use base 11, not base 10, so twelve would be eleventy-first year, and so on. Minbari base eleven includes fingers and head, from which the principle of mathematics comes. […] Eleventy-seven = Eighteen base ten. One, two, three, four, five, six, seven, eight, nine, ten, eleven. Eleventy-one, eleventy-two, eleventy-three, eleventy-four, eleventy-five, eleventy-six, eleventy-seven, eleventy-eight, eleventy-nine, eleventy-ten, twelf[t]y. Twelfty-one, twelfty-two, twelf[t]y-three, twelfty-four, twelfty-five, twelfty-six, twelfty-seven, twelfty-eight, twelfty-nine, twelfty-ten. And so on. Who here still has a problem with this?
    2007, Doug Lowe, Networking for Dummies, page 174:
    Eight-Oh-Two-Dot-Eleventy Something [= 802.11a, 802.11b, etc.]
  2. (colloquial) An indefinite large number.
    May 1921, Margaret Wilson, “A Little Boy's Utopia”, in The Atlantic Monthly, page 670:
    No grown-up people, no babies, no girls. It was a world of boys, eleventy and a hundred strong.
    2005, Robert M Sapolsky, Monkeyluv: And Other Essays on Our Lives as Animals, page 19:
    People used to think that the first eleventy letters of the DNA message would comprise Gene 1.
    • 2012 July 3, Marina Hyde, “A lesson in Olymp-o-nomics”, in The Guardian:
      According to a study by me, this generates a multibillion facepalm for the UK economy, making everyone who considers it at least eleventy hundred pounds unhappier.

Related terms[edit]