RUDIMENTARY Meaning of RUDIMENTARY in English [ ˌru:dɪ'mɛnt(ə)ri ]■ adjective1》 involving or limited to basic principles. 2》 relating to an immature, undeveloped, or basic form.Derivativesrudimentarily adverb Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004