Meaning of GRAVITY in English
1》 Physics the force that attracts a body towards the centre of the earth, or towards any other physical body having mass.
↘the degree of intensity of this, measured by acceleration.
2》 extreme importance; seriousness.
↘solemnity of manner.
C15: from OFr., or from L. gravitas 'weight, seriousness'.
Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004