| beam | (noun) long thick piece of wood or metal or concrete, etc., used in construction | - |
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| (noun) a gymnastic apparatus used by women gymnasts | Synonyms: balance beam |
| (noun) the broad side of a ship | - |
| (noun) (nautical) breadth amidships | - |
| (noun) a signal transmitted along a narrow path; guides airplane pilots in darkness or bad weather | Synonyms: radio beam |
| (noun) a column of light (as from a beacon) | Synonyms: beam of light, irradiation, light beam, ray, ray of light, shaft, shaft of light |
| (noun) a group of nearly parallel lines of electromagnetic radiation | Synonyms: electron beam, ray |