beamy \ˈbēmē\adjective (-er/-est) Etymology: Middle English beemy, from beem beam + -y 1. a.: marked by, emitting, or reflecting beams of light : bright, radiant b.: radiantly joyful : flushed with optimism or marked by happy benignness 2.: resembling a beam in size and weight : massive, broad 3.: having horns or antlers < beamy stags — John Dryden > 4.: notably broad in the beam < a beamy cargo ship > Synonyms:see bright