noun pl. gravities -·ties

1. the state or condition of being grave; esp.,
   1. solemnity or sedateness of manner or character; earnestness
   2. danger or threat; ominous quality the gravity of his illness
   3. seriousness, as of a situation
2. weight; heaviness
3. lowness of musical pitch
4. gravitation, esp. terrestrial gravitation; force that tends to draw all bodies in the earth's sphere toward the center of the earth

Etymology: L gravitas, weight, heaviness < gravis, heavy: see grave

adjective