What is the definition of lift?

Answer 1

To raise up, as in, "I was able to lift the chair onto the table."

Also used in the UK to describe an elevator.

The pressure difference between the top and bottom of the wing creates an upward force is known as LIFT.
lift means that when the plane fly's it is like two thing's straight like the wing 's on the side and you are next to the window but if you are on the side of the window you will think that it's straight and even when the wind is the opposite of the plane it will still fly but if the wind and the plane is flying the same way that mean's the plane will fall

Answer 2

Lift is the force that enables an aircraft to overcome gravity and stay aloft. It is generated by the wings of the aircraft as they move through the air, creating a pressure differential that results in an upward force.