The lift of an airfoil is the component of force produced by the airfoil in the direction perpendicular to the relative wind.
Angle of Attack, Bernoulli Effect, Drag, Lift Coefficient, Lift Force, Pitch, Relative Wind, Roll, Yaw
References
Denker, J. S. See How It Flies: New Spin on the Perceptions, Procedures, and Principles of Flight. http://www.monmouth.com/~jsd/how/htm/4forces.html