Noun

Resultant force on Earth's surface, of the attraction by the Earth's masses, and the centrifugal pseudo-force caused by the Earth's rotation.

* {{quote-magazine, date=2013-06-07, author=David Simpson

, volume=188, issue=26, page=36, magazine=(The Guardian Weekly) , title= Fantasy of navigation , passage=It is tempting to speculate about the incentives or compulsions that might explain why anyone would take to the skies in [the] basket [of a balloon]: perhaps out of a desire to escape the gravity of this world or to get a preview of the next; […].}}

Gravitation, universal force exercised by two bodies onto each other
(In casual discussion, gravity and gravitation are often used interchangeably).

* {{quote-magazine, date=2012-01, author=Michael Riordan, volume=100, issue=1, page=86

, magazine=(American Scientist) , title= Tackling Infinity , passage=Some of the most beautiful and thus appealing physical theories, including quantum electrodynamics and quantum gravity , have been dogged for decades by infinities that erupt when theorists try to prod their calculations into new domains. Getting rid of these nagging infinities has probably occupied far more effort than was spent in originating the theories.}}

The state or condition of having weight; weight; heaviness.

Specific gravity.

The state or condition of being grave (graveness).

Noun

(uncountable) The act of accelerating, or the state of being accelerated; increase of motion or action; as opposed to retardation or deceleration.

a falling body moves toward the earth with an acceleration of velocity

(countable) The amount by which a speed or velocity increases (and so a scalar quantity or a vector quantity).

The boosters produce an acceleration of 20 metres per second per second.

* (rfdate)

A period of social improvement, or of intellectual advancement, contains within itself a principle of acceleration

(physics) The change of velocity with respect to time (can include deceleration or changing direction).

The advancement of students at a rate that places them ahead of where they would be in the regular school curriculum.