[ fawr-tee ]
/ ˈfɔr ti /

noun, plural for·ties.

a cardinal number, ten times four.
a symbol for this number, as 40 or XL or XXXX.
a set of this many persons or things.
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.


amounting to 40 in number.

Origin of forty

before 950; Middle English fourti, Old English fēowertig (cognate with Old Frisian fiuwertich, Old High German fiorzug, German vierzig). See four, -ty1

Example sentences from the Web for forty

British Dictionary definitions for forty

/ (ˈfɔːtɪ) /

noun plural -ties

the cardinal number that is the product of ten and four See also number (def. 1)
a numeral, 40, XL, etc, representing this number
something representing, represented by, or consisting of 40 units


  1. amounting to fortyforty thieves
  2. (as pronoun)there were forty in the herd

Word Origin for forty

Old English fēowertig