To direct or carry from a lower to a higher position
the upward force resulting from the difference in the pressure between the upper and lower surfaces of a wing.
McMurphy wants to try to throw it through the reinforced window of the washroom so he and the other patients can escape.
If you are referring to a 'lift' on a lock, then this is usually a crank in a cam to allow for more space to allow clearance for the door.
The pressure difference between the top and bottom of the wing creates an upward force is known as LIFT.