1. (a.) Expanded; large; broad; wide; comprehensive; as, an extensive sphere of operations\; extensive benevolence; extensive greatness.

2. (a.) Capable of being extended.

Gargantuan a mile long all-embracing ample amplitudinous astronomical awesome big boundless broad bulky capacious catholic colossal commodious comprehensive considerable copious cosmic cosmopolitan deep diffuse dilatant distensive elastic enormous expansible expansile expansional expansive extended extending extensile extensional far-embracing far-extending far-flung far-flying far-going far-ranging far-reaching fargoing full galactic general generous gigantic global great huge immeasurable immense inclusive indiscriminate infinite inflatable inflationary interminable international king-size large large-scale lengthy liberal long longish longsome mammoth massive massy monster monstrous monumental mountainous national no end of outsize overgrown prodigious roomy scopic sesquipedal sesquipedalian sizable sizeable spacious spreading stupendous substantial sweeping tall titanic tremendous universal vast voluminous weighty wholesale wide wide-extended wide-extending wide-ranging wide-reaching wide-stretching widespread without end worldwide