Pronunciation: (grav'i-tē),[key] —n., —pl.-ties. 1. the force of attraction by which terrestrial bodies tend to fall toward the center of the earth.
2. heaviness or weight.
3. gravitation in general.
4. See acceleration of gravity. 5. a unit of acceleration equal to the acceleration of gravity. Symbol: g
6. serious or critical nature: He seemed to ignore the gravity of his illness. 7. serious or dignified behavior; dignity; solemnity: to preserve one's gravity. 8. lowness in pitch, as of sounds.