Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. The cardinal number equal to 5 × 10.
  • n. A decade or the numbers from 50 to 59: They began playing golf in their fifties. With the sunshine, the temperature reached the fifties.
  • n. The decade from 50 to 59 in a century.
  • n. A fifty-dollar bill.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. The cardinal number occurring after forty-nine and before fifty-one.
  • n. A fifty-dollar bill.
  • n. A fifty-pound note.

from the GNU version of the Collaborative International Dictionary of English

  • adj. Five times ten.
  • n. The sum of five tens; fifty units or objects.
  • n. A symbol representing fifty units, as 50, or l.

from The Century Dictionary and Cyclopedia

  • Five times ten; ten more than forty, or one more than forty-nine: a cardinal numeral.
  • n. The sum of five tens, or of forty-nine and one.
  • n. A symbol representing this number, as 50, L, or 1

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

  • adj. being ten more than forty
  • n. the cardinal number that is the product of ten and five
  • n. a United States bill worth 50 dollars

Etymologies

Middle English fifti, from Old English fīftig; see penkwe in Indo-European roots.
(American Heritage® Dictionary of the English Language, Fourth Edition)
Old English fīftiġ (Wiktionary)

Examples

  • Lord Durham wrote, over fifty [Errata: (from final page) for _fifty_ read _forty_.] years ago, of the French Canadians: 'They are a people without a history and a literature.'

    The Intellectual Development of the Canadian People

  • The difference between never becoming fixed, and becoming fixed once in fifty is definitely not random.

    The Weasel Thread

  • I seemed to need to hear a word fifty times for it to register.

    Fair Game

  • Now that's what I call fifty quid an hour well spent.

    David Lloyd's Names

  • The Ceasefire Campaign on Monday said it was strongly opposed to what it called a fifty percent increase in defence spending over the next three years.

    ANC Daily News Briefing

  • He wrote under this title fifty-five papers, which were published twice a week between December, 1715, and June, 1716; and he was rewarded with the post of Commissioner for Trade and Colonies.

    The Spectator, Volume 1 Eighteenth-Century Periodical Essays

  • In other words, your record can now come out on a label fifty per cent owned by EMI, and still be magically 'independent'.

    No Rock And Roll Fun

  • No one wants to read, 'As you know, Kodos, our home planet is so civilized that we have not had a war in fifty trillion years,' said Kang.

    A Writer's Show-and-Tell

  • Everyone wonders what the face of hunting and fishing will look like in fifty years.

    Uncategorized Blog Posts

  • If we want hunting to exist in fifty years we as hunters need to set our petty differences aside and unite as one.

    NC Sunday-Hunting Bill Faces Deadline

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