a hinge closing automatically by means of gravity.
noun, Geology. 1. (def 2).
- Gravity platform
noun 1. (in the oil industry) a drilling platform that rests directly on the sea bed and is kept in position by its own weight; it is usually made of reinforced concrete
noun 1. a railroad depending partly on the force of gravity for motive power.
- Gravity scale
noun 1. a scale giving the relative density of fluids See API gravity scale