Dictionary definition · prophylactic
noun
- remedy that prevents or slows the course of an illness or disease"the doctor recommended several preventatives"
- contraceptive device consisting of a sheath of thin rubber or latex that is worn over the penis during intercourse
adjective
- capable of preventing conception or impregnation"contraceptive devices and medications"
- warding off"the swastika … a very ancient prophylactic symbol occurring among all peoples"
- preventing or contributing to the prevention of disease"preventive medicine"
Source: Open English WordNet (CC BY 4.0).