long thick piece of wood or metal or concrete, etc., used in construction | one of the longitudinal beams running along either side of a railway vehicle, onto which the bodywork is mounted, in passenger-carrying vehicles usually forming the side or the base of the floor. |
a gymnastic apparatus used by women gymnasts | |
the broad side of a ship | |
(nautical) breadth amidships | |
a signal transmitted along a narrow path; guides airplane pilots in darkness or bad weather | |
a column of light (as from a beacon) | |
a group of nearly parallel lines of electromagnetic radiation | |