Plain English Meaning
The wheel under the front of the airplane. It holds the nose up off the ground and is usually steered with the rudder pedals when taxiing.
Full Definition
The single landing gear wheel located at the front of the airplane, beneath the nose, that supports the forward portion of the aircraft on the ground and provides directional control during taxi, takeoff, and landing rollout on tricycle-gear aircraft.
Context Anchor
Seen during the preflight inspection and any time the airplane is moving on the ground.
Why Pilots Care
The nosewheel provides directional control during taxi, takeoff, and landing; improper handling can cause loss of directional control or damage.