1. [Adjective]: tending to prevent or hinder

2. [Noun]: any obstruction that impedes or is burdensome

3. [Noun]: an agent or device intended to prevent conception

4. [Noun]: remedy that prevents or slows the course of an illness or disease; "the doctor recommended several preventatives"

5. preventing or contributing to the prevention of disease; "preventive medicine"; "vaccines are prophylactic"; "a prophylactic drug"

6. tending to ward off; "the swastika...a very ancient prophylactic symbol occurring among all peoples"- Victor Schultze

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