What is the meaning of Typewriter?

A device, at least partially mechanical, used to print text by pressing keys that cause type to be impressed through an inked ribbon onto paper.

One who uses a typewriter; a typist.

A machine gun or submachine gun (from the noise it makes when firing).

A prank in which fingers are jabbed roughly onto someone's chest followed by striking them over the ear in imitation of using an old-fashioned typewriter.

Source: wiktionary.org