the action of an aircraft in becoming airborne or of a rocket in rising from its launching site under its own power.
the instant when such action occurs.
the launching or commencement of a project, plan, etc.:
The liftoff of the sales campaign will be next month.
that removes by lifting off; capable of being lifted off:
a liftoff correction tape for typewriters; magnetized, liftoff nameplates.
noun, adj. use of verb phrase
the initial movement or ascent of a rocket from its launch pad
the instant at which this occurs
) (of a rocket) to leave its launch pad
Collins English Dictionary - Complete & Unabridged 10th Edition
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