GRATIS Meaning of GRATIS in English [ 'gratɪs , 'grα:- , 'greɪ- ]■ adverb & adjective free of charge.OriginME: from L., contr. of gratiis 'as a kindness', from gratia 'grace, kindness'. Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004