Definition of gravities:
(n) :
(physics) The phenomenon that, on earth, objects have weight; the similar phenomenon on other celestial bodies such as the moon.
(n) :
(loosely, see usage notes) Gravitation, the universal force exercised by two bodies on each other by virtue of their masses.
(n) :
(physics) A law or laws of gravitation: any theory which attempts to account for the phenomena of weight and/or the mutual attraction of massive objects (Aristotelian gravity, Newtonian gravity).
(n) :
The state or condition of having weight; weight; heaviness.
(n) :
The state or condition of being grave; seriousness.
(n) :
(music) The lowness of a note.