A little clarity.
From A to Z.
Quick definitions with a way into the bigger idea.
Airfoil
A shaped surface designed to produce useful aerodynamic forces as air flows around it.
Altitude
Vertical distance above a specified reference level. The reference matters.
Drag
The aerodynamic force component parallel to and opposing relative motion through the air.
Heading
The direction in which the aircraft’s nose points, expressed relative to a reference north.
Lift
The aerodynamic force component perpendicular to the relative airflow.
Pitch
Rotation about an aircraft’s lateral axis: the nose moves up or down.
Roll
Rotation about the longitudinal axis: one wing rises as the other falls.
Thrust
The propulsive force produced by an engine and propeller or jet.
Weight
The gravitational force acting on an aircraft.
Yaw
Rotation about the vertical axis: the nose moves left or right.