Launcher (noun)

1. A device or mechanism for launching a missile, rocket, or other projectile.
2. A program or application that starts other programs or applications on a computer or mobile device.
3. A device or machine used to launch something, such as a projectile or a satellite.

Origin:

Mid 19th century: from launch + -er.

Examples:

1. The missile launcher was ready for launch.
2. The rocket launcher was used to launch the satellite into orbit.
3. The launcher app was used to start other programs on the computer.
4. The launcher was designed to launch the spacecraft into space.
5. The launcher was activated and the projectile was launched successfully.