1. (a.) Seriousness; severity; heaviness; as, the gravity of a difficult situation.

2. (a.) Sobriety of character or demeanor.

3. (a.) Importance, significance, dignity, etc; hence, seriousness; enormity; as, the gravity of an offense.

4. (n.) 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.

5. (a.) Lowness of tone; -- opposed to acuteness.