Lift is a mechanical force. It is generated by the interaction and contact of a solid body with a fluid (liquid or gas). It is not generated by a force field, in the sense of a gravitational field,or an electromagnetic field, where one object can affect another object without being in physical contact.
https://www.grc.nasa.gov/WWW/K-12/airplane/lift1.html
The overall result is that a reaction force, the lift, is generated opposite to the directional change. In the case of an airplane wing, the wing exerts a downward force on the air and the air exerts an upward force on the wing.
https://en.wikipedia.org/wiki/Lift_(force)
The Four Forces. 1  Weight is the force of gravity. It acts in a downward direction—toward the center of the Earth.  Lift is the force that acts at a right angle to the direction of motion through the air.
https://howthingsfly.si.edu/forces-flight/four-forces
Four Forces Affect Things That Fly: 1  Weight is the force of gravity. It acts in a downward direction—toward the center of the Earth.  Lift is the force that acts at a right angle to the direction of motion through the air. Lift is created by differences in air pressure.
https://howthingsfly.si.edu/forces-flight/four-forces
Building Trades. the height of the quantity of concrete poured into a form at one time. 45. Naval Architecture. any of the horizontal planks forming a type of half model (lift model) able to be removed and measured as a guide to laying out the water lines of the vessel at full scale.
http://www.dictionary.com/browse/lift
Lift is the force that directly opposes the weight of an airplane and holds the airplane in the air. Lift is generated by every part of the airplane, but most of the lift on a normal airliner is generated by the wings. Lift is a mechanical aerodynamic force produced by the motion of the airplane through the air. Because lift is a force, it is a vector quantity, having both a magnitude and a direction associated with it. Lift acts through the center of pressure of the object and is directed perpendicular to the flow direction.
https://www.grc.nasa.gov/WWW/K-12/airplane/lift1.html
1 Lift is the force that acts at a right angle to the direction of motion through the air. Lift is created by differences in air pressure.  Thrust is the force that propels a flying machine in the direction of motion. Engines produce thrust.
https://howthingsfly.si.edu/forces-flight/four-forces
An upward force acting on an object. Lift can be produced in many ways; for example, by creating a low-pressure area above an object, such an airplane wing or other airfoil that is moving through the air, or by lowering the overall density of an object relative to the air around it, as with a hot air balloon. Compare drag.
http://www.dictionary.com/browse/lift
Lift is most commonly associated with the wing of a fixed-wing aircraft, although lift is also generated by propellers, kites, helicopter rotors, rudders, sails and keels on sailboats, hydrofoils, wings on auto racing cars, wind turbines, and other streamlined objects.
https://en.wikipedia.org/wiki/Lift_(force)
Four Forces Affect Things That Fly: 1  Weight is the force of gravity. 2  Lift is the force that acts at a right angle to the direction of motion through the air. 3  Thrust is the force that propels a flying machine in the direction of motion.  Drag is the force that acts opposite to the direction of motion.
https://howthingsfly.si.edu/forces-flight/four-forces
what is lift
Lift is a force that acts at a right angle to the direction of motion through the air.