Cam/kæm/ Definition 1 of 4Pro Tip 1/3Mechanical Context Used to describe parts in engines or machines, often related to motion. The antique clock stopped because the cam was stuck. Pro Tip 2/3Precise Movement Indicates a component designed for accuracy within a machine. A cam's shape determines the motion it produces. Pro Tip 3/3Technical Term Mostly used by engineers, mechanics, or technical professionals. She adjusted the cam to improve the engine's performance.