launchinstruction
nounUK /lɔːntʃ ɪnˈstrʌkʃən/
US /lɔːntʃ ɪnˈstrʌkʃən/
A launch instruction is a rule that tells you how to start something.
Read the launch instruction before you press the big red button.
OTHER MEANINGS
2. A command that tells a computer program to begin running.
The app waited for the launch instruction from the user.
3. A step in a guide that explains how to send a rocket into the sky.
The launch instruction said to check the fuel first.
4. A note that tells someone how to begin a new project or event.
The teacher gave a launch instruction for the science fair.