rudimentary /ˌɹuːdɪˈmɛntəɹi/adjective 2noun 1forms 3 adjective2 •Of or relating to one or more rudiments; of the nature of an early stage.The state of moral and social feeling, prevalent in legendary Greece, exhibits a scene in harmony with the rudimentary political fabric just described. — 1846 •Basic; minimal; with less than, or only the minimum, necessary.I have only a rudimentary grasp of chemistry.His grasp of rudimentary English allowed him at least to do the shopping. noun[usually plural]1 •One of the rudimentary mammae of boars.A litter of nine pigs was farrowed, four of the boars having rudimentaries, and one lacking them, while three of the sows lacked rudimentaries and the fourth possessed them. — 1916 formsrudimentaries · more rudimentary · most rudimentary