TENTATIVE Meaning of TENTATIVE in English ■ adjective not certain or fixed; provisional. ↘hesitant.Derivatives~ly adverb~ness noun OriginC16: from med. L. tentativus , from tentare , var. of temptare 'handle, try'. Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004