For·ty a. Four times ten; thirty-nine and one more.
For·ty, n.; pl. Forties
1. The sum of four tens; forty units or objects.
2. A symbol expressing forty units; as, 40, or xl.
adj : being ten more than thirty [syn: 40, xl, twoscore]
n : the cardinal number that is the product of ten and four
[syn: 40, XL]