Machining is a manufacturing process where material is removed from a workpiece to shape it into a desired form. It involves tools like lathes, mills, and drills, which cut, grind, or shear away material, usually metal or plastic. Machining is used to create parts with precise dimensions and smooth finishes for various industries, including automotive, aerospace, and electronics. It can be done manually or through CNC (computer numerical control) machines for high precision and automation.