Plain English Meaning

When wind is pushing the airplane sideways, the pilot points the nose slightly into the wind to cancel out the push and keep the airplane moving along the desired line over the ground.

Full Definition

An adjustment of the airplane's heading into the wind to offset sideways displacement caused by a crosswind, so the airplane tracks the intended ground path rather than being blown off course.

Context Anchor

Used during takeoff and initial climb, especially when wind is blowing from one side of the runway.

Derivation

Drift comes from the Old English drīfan, 'to drive or be driven.' Here it refers to the airplane being driven sideways by the wind. simply means the adjustment made to it.