masculinity

from WordNet (r) 3.0 (2006)

masculinity
    n 1: the properties characteristic of the male sex [syn:
         {maleness}, {masculinity}] [ant: {femaleness},
         {feminineness}]
    2: the trait of behaving in ways considered typical for men
       [ant: {femininity}, {muliebrity}]

from The Collaborative International Dictionary of English v.0.48

Masculinity \Mas`cu*lin"i*ty\, n.
   The state or quality of being masculine; masculineness.
   [1913 Webster]