Condom (noun)

1. A sheath of thin rubber or other material worn on a man's penis during sexual intercourse to prevent pregnancy or infection.
2. A device worn on the penis during intercourse to prevent pregnancy or the spread of sexually transmitted infections.

Origin:

Late 16th century: from french condom, from latin condus "receptacle", from con- "together with" + -dus (from the verb dare "to give").

Examples:

1. It's important to use a condom every time you have sex to protect yourself and your partner from sexually transmitted infections.
2. She always carries a few condoms in her purse, just in case.
3. I bought a pack of condoms at the pharmacy.
4. The condom broke and she ended up pregnant.
5. It's important to use a lubricant with condoms to reduce the risk of breakage.