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forty

[fawr-tee] /ˈfɔr ti/
noun, plural forties.
1.
a cardinal number, ten times four.
2.
a symbol for this number, as 40 or XL or XXXX.
3.
a set of this many persons or things.
4.
forties, the numbers, years, degrees, or the like, from 40 through 49, as in referring to numbered streets, indicating the years of a lifetime or of a century, or degrees of temperature:
His office is in the West Forties. Her parents are in their forties. The temperature will be in the forties.
adjective
5.
amounting to 40 in number.
Origin
950
before 950; Middle English fourti, Old English fēowertig (cognate with Old Frisian fiuwertich, Old High German fiorzug, German vierzig). See four, -ty1
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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Examples from the web for forty
  • forty years ago the trouble there amounted to a territorial dispute between two fairly secular tribes.
  • forty years ago this month the lunar surface reverberated with life for the first time.
  • The revolution in medicine that spans those forty years in nearly exponential ways, and continues going forward.
  • forty years ago, researchers developed a programming language that would become a brilliant educational tool.
  • forty years ago, instantaneous global communication was possible but costly, and restricted to governments and large corporations.
  • First, the basket of goods is completely different now than it was forty years ago so it is not comparable.
  • forty percent of the continent's fish species are at risk of extinction.
  • forty years ago social psychologists tried to figure out what made prejudiced people tick.
  • forty years as an educator have taught me there is a great difference between schooling and education.
  • forty boulders, known as grandfather rocks, greet visitors around the museum.
British Dictionary definitions for forty

forty

/ˈfɔːtɪ/
noun (pl) -ties
1.
the cardinal number that is the product of ten and four See also number (sense 1)
2.
a numeral, 40, XL, etc, representing this number
3.
something representing, represented by, or consisting of 40 units
determiner
4.
  1. amounting to forty: forty thieves
  2. (as pronoun): there were forty in the herd
Word Origin
Old English fēowertig
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Word Origin and History for forty
n.

Old English feowertig, from feower "four" (see four) + tig "group of ten" (see -ty (1)). Cf. Old Saxon fiwartig, Old Frisian fiuwertich, Dutch veertig, Old High German fiorzug, German vierzig, Old Norse fjorir tigir, Gothic fidwor tigjus.

[T]he number 40 must have been used very frequently by Mesha's scribe as a round number. It is probably often used in that way in the Bible where it is remarkably frequent, esp. in reference to periods of days or years. ... How it came to be so used is not quite certain, but it may have originated, partly at any rate, in the idea that 40 years constituted a generation or the period at the end of which a man attains maturity, an idea common, it would seem, to the Greeks, the Israelites, and the Arabs. ["The International Standard Bible Encyclopedia," James Orr, ed., Chicago, 1915]
Forty winks "short sleep" is attested from 1821, In early use associated with, and perhaps coined by, eccentric English lifestyle reformer William Kitchiner M.D. (1775-1827).

Online Etymology Dictionary, © 2010 Douglas Harper
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