Handgun (noun)

A small firearm that can be held and fired with one hand.

Origin:

Handgun (n.) 1864, from hand (n.) + gun (n.).

Examples:

1. He was carrying a handgun for protection.
2. She was trained in the use of handguns.
3. The criminal had a handgun in his possession.
4. He owns several handguns for target shooting.
5. The police officer was carrying a handgun as part of his duty.