rudimentary Syllabification: (ru·di·men·ta·ry)Pronunciation: /ˌro͞odəˈment(ə)rē/Translate rudimentary | into French | into German | into Italian | into Spanish Definition of rudimentary adjective involving or limited to basic principles:he received a rudimentary education of or relating to an immature, undeveloped, or basic form:a rudimentary stage of evolutionDerivatives rudimentarilyPronunciation: /-menˈte(ə)rəlē, -ˈment(ə)rəlē/ adverb rudimentariness noun The ending of rudimentary is spelled -ary.rudimentary in other Oxford dictionaries Definition of rudimentary in the British & World English dictionary