definition of
prophylactic

[1] #1 prophylactic n. [preventive, preventative] remedy that prevents or slows the course of an illness or disease; "the doctor recommended several preventatives". wn

[2] #2 prophylactic n. [condom, rubber, safety, safe] contraceptive device consisting of a sheath of thin rubber or latex that is worn over the penis during intercourse. wn

[3] #3 prophylactic s. [preventive, preventative] preventing or contributing to the prevention of disease; "preventive medicine"; "vaccines are prophylactic"; "a prophylactic drug". wn