Definition
The action of smoothly applying back pressure on the elevator control during the takeoff roll to raise the airplane's nose to the takeoff pitch attitude, allowing the wings to generate enough lift to leave the runway.
Plain English
Pulling back on the controls at the right speed during takeoff to lift the nose so the airplane can fly off the runway.
Context Anchor
Seen during pre-takeoff checks and safety warnings, especially around a running engine or propeller.
Derivation
From the Latin 'rotare', meaning 'to turn'. In aviation, the airplane is 'rotating' around its lateral axis (the wingtip-to-wingtip line) as the nose comes up and the tail comes down. The word captures the pivoting motion of the airplane during this moment.
Why Pilots Care
Correct rotation timing and rate produce a safe liftoff at the proper airspeed and pitch attitude, avoiding runway overrun, tail strike, or stall.
Intuition Check
Do not assume rotating always means the airplane is lifting off or raising its nose for takeoff. Here, it means a part is turning around its center, such as a propeller turning on the airplane.
Example Sentence 1
As the airspeed indicator reached the rotation speed, the pilot began rotating by smoothly applying back pressure on the yoke.
Example Sentence 2
In a heavy airplane the pilot rotates more gradually to avoid a tail strike.