FUNDAMENT Meaning of FUNDAMENT in English [ 'fʌndəm(ə)nt ]■ noun1》 the foundation or basis of something. 2》 humorous a person's buttocks or anus.OriginME: from OFr. fondement , from L. ~um , from fundare 'to found'. Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004