basis Pronunciation: /ˈbeɪsəs; ˈbeɪsɪs/Translate basis | into French | into German | into Italian Spanish translation of basisn (pl bases /ˈbeɪsiːz/) 1 c u (foundation, grounds) base (f) 2 (system, level) (no pl) employed on a daily basis = contratado por día on a regional basis = a nivel regionalbasis in other Oxford dictionaries Definition of basis in the British & World English dictionary Definition of basis in the US English dictionary