gEnglishOxford New American Dictionaryg /jē, dʒi / ▸ abbreviation 1 Chemistry gas. 2 gelding. 3 gram(s). 4 Physics denoting quantum states or wave functions which do not change sign on inversion through the origin. The opposite of u. [from German gerade ‘even’.] ▸ symbol Physics the acceleration due to gravity, equal to 9.81 m/s2.