Definition of gravity noun from the Oxford Advanced Learner's Dictionary

     

    gravity

     noun
    noun
    BrE BrE//ˈɡrævəti//
     
    ; NAmE NAmE//ˈɡrævəti//
     
    [uncountable] Energy and physical forces, Space travel, The universe
     
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  1. 1 (abbreviation g) the force that attracts objects in space towards each other, and that on the earth pulls them towards the centre of the planet, so that things fall to the ground when they are dropped Newton’s law of gravity see also centre of gravity Wordfinderamplitude, atom, energy, fission, force, frequency, gravity, molecule, nuclear, physics See related entries: Energy and physical forces, Space travel, The universe
  2. 2(formal) extreme importance and a cause for worry synonym seriousness I don't think you realise the gravity of the situation. Punishment varies according to the gravity of the offence.
  3. 3(formal) serious behaviour, speech or appearance They were asked to behave with the gravity that was appropriate in a court of law.
  4. see also grave1
    Word Origin late 15th cent. (in sense (2)): from Old French, or from Latin gravitas ‘weight, seriousness’, from gravis ‘heavy’. Sense (1) dates from the 17th cent.Extra examples Criminal law does not treat traffic offences with the gravity they deserve. Europe’s economic centre of gravity shifted northwards. Gravity bends light like a lens. Gravity pulls objects together. I don’t think you realize the extreme gravity of the situation. The building leans so much that it seems to defy gravity. The threat is not being treated with the gravity it deserves. The water flows from the tank by gravity to the houses below. The world’s economic centre/​center of gravity is shifting east. a low centre/​center of gravity the weak gravity on the moon
See the Oxford Advanced American Dictionary entry: gravity