01 v. i. to begin a leap from a surface or a flight into the air; especially, (of a bird or an airplane) to leave the ground and begin to fly; as, f…
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1.
to begin a leap from a surface or a flight into the air; especially, (of a bird or an airplane) to leave the ground and begin to fly; as, flight CA123 took off on schedule at 3:00 PM.
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2.
To begin a period of accelerating growth or development; as, the economy took off in the third quarter.
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3.
To begin a journey; to depart.