Wordnet 3.0
NOUN (1)
1. 
 a communicable infection transmitted by sexual intercourse or genital contact; 
[syn: venereal disease, VD, venereal infection, social disease, Cupid's itch, Cupid's disease, Venus's curse, dose, sexually transmitted disease, STD]
WordNet (r) 3.0 (2006):
sexually transmitted disease
    n 1: a communicable infection transmitted by sexual intercourse
         or genital contact [syn: venereal disease, VD,
         venereal infection, social disease, Cupid's itch,
         Cupid's disease, Venus's curse, dose, sexually
         transmitted disease, STD]