Definition of the 6 simple machines?

The six simple machines are fundamental devices that alter the direction or magnitude of a force. They include the lever, which amplifies input force through a pivot point; the inclined plane, which allows objects to be raised with less effort; the wheel and axle, which reduces friction for easier movement; the pulley, which changes the direction of force; the screw, which converts rotational force into linear motion; and the wedge, which separates materials by converting force into a downward motion. Together, these machines form the basis of more complex mechanical systems.