Liftoff definition

lĭftôf, -ŏf
The initial movement by which or the instant in which a rocket or other such craft commences flight.
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The initial vertical takeoff of a rocket, helicopter, etc.
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The moment at which this occurs.
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The point in the launch of a rocket or an aircraft where it leaves contact with the ground.
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Alternative Forms

Alternative Form of liftoff - lift-off

Other Word Forms

Noun

Singular:
liftoff
Plural:
liftoffs