Source : Webster's Revised Unabridged Dictionary (1913)

Sexuality \Sex`u*al"i*ty\, n.
   The quality or state of being distinguished by sex.
   --Lindley.

Source : WordNet®

sexuality
     n : the properties that distinguish organisms on the basis of
         their reproductive roles; "she didn't want to know the
         sex of the foetus" [syn: {sex}, {gender}]