The Collaborative International Dictionary of English v.0.48:

Sterility \Ste*ril"i*ty\, n. [L. sterilitas: cf. F.
   st['e]rilit['e].]
   1. The quality or condition of being sterile.
      [1913 Webster]

   2. (Biol.) Quality of being sterile; infecundity; also, the
      state of being free from germs or spores.
      [1913 Webster]

WordNet (r) 3.0 (2006):

sterility
    n 1: (of non-living objects) the state of being free of
         pathogenic organisms [syn: asepsis, antisepsis,
         sterility, sterileness]
    2: the state of being unable to produce offspring; in a woman it
       is an inability to conceive; in a man it is an inability to
       impregnate [syn: sterility, infertility] [ant:
       fecundity, fertility]