lift off

US /ˈlɪft ɔf/
UK /ˈlɪft ɔf/
"lift off" picture
1.

the action of a spacecraft, rocket, or helicopter leaving the ground

:
The space shuttle's lift-off was delayed due to bad weather.
We watched the helicopter's smooth lift-off from the helipad.
1.

for a spacecraft, rocket, or helicopter to leave the ground

:
The rocket is scheduled to lift off at dawn.
The drone began to lift off slowly from the ground.