EXTENSIVE

adj. 1 broad, wide, expansive, far-reaching, far-ranging, wide-ranging, far-flung, sweeping, widespread, comprehensive, all-embracing; national, nationwide, international, intercontinental, cosmopolitan, worldwide, global, universal, vast; cosmic; catholic The storm is responsible for extensive crop damage He has extensive business connections. 2 large, big, great, huge, substantial, considerable, sizeable, immense, enormous, vast, gigantic, massive; voluminous, spacious, commodious, capacious The extensive gold deposits were soon depleted The cave contains several extensive chambers.