40

from WordNet (r) 3.0 (2006)

40
    adj 1: being ten more than thirty [syn: {forty}, {40}, {xl},
           {twoscore}]
    n 1: the cardinal number that is the product of ten and four
         [syn: {forty}, {40}, {XL}]

from The Collaborative International Dictionary of English v.0.48

40 \40\ adj.
   1. one more than thirty-nine; four times ten; denoting a
      quantity consisting of fourty items or units; --
      representing the number fourty as an Arabic numeral.

   Syn: forty, xl, twoscore
        [WordNet 1.5 +PJC]