What does "launcher" mean?

One who or that which launches. A device that throws something or the person who initiates a launch.

Launcher

Common synonyms include: app launcher, catapult, firing device, home screen, projector, rocket launcher.

/ˈlɑnt͡ʃ.ɚ/ noun

noun ·Rare ·Advanced level

Noun

1
One who or that which launches. A device that throws something or the person who initiates a launch.
"The catapult made a good launcher for the small projectile."
2
a device that launches aircraft from a warship wordnet
3
An application that launches another or others, often holding icons or menus for frequently used programs.
4
armament in the form of a device capable of launching a rocket wordnet

"General Anan says an abandoned anti-tank M-72 grenade launcher was found in a small lane near the building amid shattered glass and masonry."

From launch + -er.