Definition
The phase of flight in which an airplane accelerates along the runway, transitions from ground roll to flight, and climbs away from the surface to begin the departure portion of a flight. A takeoff begins with the application of takeoff power and ends once the airplane has established a stable climb at a safe altitude and airspeed.
Plain English
The part of the flight where the airplane speeds down the runway, lifts into the air, and climbs away from the airport.
Context Anchor
You encounter this term in airport operations, traffic pattern training, preflight planning, and discussions of normal, short-field, soft-field, and crosswind departures.
Derivation
From the everyday phrase 'to take off,' meaning to depart or leave the ground. In aviation it became the standard noun for the act of an aircraft becoming airborne.
Why Pilots Care
Correct takeoff performance, technique, and decision-making directly affect runway length required, obstacle clearance, and safe separation from other traffic.
Intuition Check
Do not think of a takeoff as only the instant the wheels leave the ground. In pilot training, takeoffs include the setup, acceleration, lift-off, and first climb away from the runway.
Example Sentence 1
The instructor demonstrated short-field and soft-field takeoffs during the training flight.
Example Sentence 2
Soft-field takeoffs require holding the nosewheel off the surface as long as possible to reduce drag.