definition of
substantive

[1] #1 substantive s. [substantial] having a firm basis in reality and being therefore important, meaningful, or considerable; "substantial equivalents". wn

[2] #2 substantive n. any word or group of words functioning as a noun. wn

[3] #3 substantive a. [essential] defining rights and duties as opposed to giving the rules by which rights and duties are established; "substantive law". wn