Meaning of BASIS in English

BASIS

n. 1 foundation, base, bottom, heart, footing, principle, underpinning; infrastructure The three R's form the basis of elementary education Do you think our society still rests on the basis of the family? 2 essence, main ingredient or constituent, point of departure The basis of the discussion is that the hospitals are understaffed

Oxford thesaurus English vocab.      Английский словарь Оксфорд тезаурус.