Senses relating to seriousness. • Of an activity such as a ceremony, a person's conduct, etc.: the quality of being deeply serious and solemn, especially in a dignified manner; seriousness, solemnity; (countable, archaic or obsolete) a serious or solemn thing, such as a matter, a comment, etc. • Of an activity, situation, words, etc.: the quality of having important or serious consequences; importance, seriousness. • Authority, influence, weight; also, used as a title for a person with authority or influence. • Senses relating to physical qualities. • The lowness in pitch of a note, a sound, etc. • Synonym of gravitation (“the fundamental force of attraction which exists between all matter in the universe that tends to draw bodies towards each other, due to matter causing the curvature of spacetime”); also, a physical law attempting to account for the phenomena of this force. • Synonym of g-force (“the acceleration of a body relative to the freefall acceleration due to any local gravitational field, expressed in multiples of g0 (the mean acceleration due to gravity (sense 2.2.1) at the Earth's surface)”). • Dated except in centre of gravity: specific gravity or relative density (“a dimensionless measure which is the ratio of the mass of a substance to that of some reference substance (chiefly an equal volume of water at 4°C)”); also, heaviness, weight. • The tendency to have weight and thus move downwards, formerly believed to be an inherent quality of some objects. • The quality of being unable or unwilling to move quickly; heaviness, sluggishness.