blast off phrasal verb (see also blast)
if a spacecraft blasts off, it leaves the ground
⇒ blast-off

[TahlilGaran] Dictionary of Contemporary English ▲

ˈblast-off noun [uncountable]
the moment when a spacecraft leaves the ground:
Ten seconds to blast-off.
⇒ blast off at blast²

[TahlilGaran] Dictionary of Contemporary English ▲

blast off
to shoot into the sky (used for a rocket)
The rocket blasted off at noon.

[TahlilGaran] English Idioms Dictionary ▲

blast off
v.
1. To begin a rocket flight.
The astronaut will blast off into orbit at six o'clock.
2. also blast away informal To scold or protest violently.
The coach blasted off at the team for poor playing.

[TahlilGaran] English Idioms Dictionary ▲