English Dictionary

preventive

/pɹɪˈvɛntɪv/

noun

(dated) A thing that prevents, hinders, or acts as an obstacle to. / (nonstandard) A thing that slows the development of an illness. / A contraceptive, especially a condom.

Wearing a mask is a preventive measure against the spread of diseases.

意味（1）

(dated) A thing that prevents, hinders, or acts as an obstacle to.

Dogs should be warmly but airily housed; heartily, but not heatingly, fed — old Indian meal, mixed with oatmeal, suppawn, is the best general food, with a small quantity of salt, which is a preventive against worms […]

意味（2）

(nonstandard) A thing that slows the development of an illness.

意味（3）

A contraceptive, especially a condom.