1 beam /ˈbiːm/ noun
plural beams
1 beam
plural beams
Learner's definition of BEAM
: a line of light coming from a source (such as the sun or a headlight)
see also high beam, low beam, sunbeam
: a line of energy, particles, etc., that cannot be seen
: a long and heavy piece of wood or metal that is used as a support in a building or ship
see also balance beam

off beam

British, informal
: incorrect or mistaken

on the beam

: exactly correct

— beamed

2 beam /ˈbiːm/ verb
beams; beamed; beaming
2 beam
beams; beamed; beaming
Learner's definition of BEAM
[no object] : to smile happily
[+ object] : to say (something) while smiling happily
: to send out beams of light or energy
[no object]
[+ object]
[+ object] : to send out (information, television signals, etc.) through wires or the air
[+ object] in stories : to send (someone) to another place instantly by using a special machine