Gravity

1. The tendency of a mass of matter toward a center of attraction; esp., the tendency of a body toward the center of the earth; terrestrial gravitation.
2. Lowness of tone; -- opposed to acuteness.
3. Sobriety of character or demeanor.
4. The state of having weight; beaviness; as, the gravity of lead.
5. Importance, significance, dignity, etc; hence, seriousness; enormity; as, the gravity of an offense.