n. pl. See Forty. [ 1913 Webster ]
a. [ AS. feówertigo&unr_;a. See Forty. ]
n. One of forty equal parts into which one whole is divided; the quotient of a unit divided by forty; one next in order after the thirty-ninth. [ 1913 Webster ]
n. the time of life between 40 and 50.
(Naut.) The middle latitudes of the southern hemisphere. So called from the boisterous and prevailing westerly winds, which are especially strong in the South Indian Ocean up to 50° S. [ Webster 1913 Suppl. ]