1. capable of preventing conception or impregnation

    Synonyms : antifertility, contraceptive
  2. warding off

    Synonyms : cautionary
    Examples :
    • the swastika...a very ancient prophylactic symbol occurring among all peoples
  3. contraceptive device consisting of a sheath of thin rubber or latex that is worn over the penis during intercourse

    Synonyms : condom, rubber, safe, safety
    Type Of : contraceptive, contraceptive device, birth control device, preventative, preventive, prophylactic device
  4. remedy that prevents or slows the course of an illness or disease

    Synonyms : preventative, preventive
    Type Of : remedy, therapeutic, cure, curative
  5. preventing or contributing to the prevention of disease

    Synonyms : preventative, preventive
    Examples :
    • vaccines are prophylactic
    • a prophylactic drug