Beam may refer to: Beam (structure), a construction element Beam (nautical), the most extreme width (or breadth) of a nautical vessel, or a point alongside the ship at the mid-point of its length A narrow, propagating stream of particles or energy: Charged particle beam Cathode ray, or "electron beam" Light beam Beam (music), a connection line in musical notation Balance beam (gymnastics), a piece of gymnastics equipment BEAM robotics, an automatically moving machine based on analog electron… (More on Beam)