<p><strong>Adjective</strong></p><ul><li>having a wide range or extent; comprehensive; extensive: expansive mountain scenery.</li><li>(of a person's character or speech) effusive, unrestrained, free, or open: Our expansive host welcomed us warmly.</li><li>tending to expand or capable of expanding.</li><li>causing expansion: the expansive force of heat.</li><li>working by expansion, as an engine.</li><li>Psychiatry: marked by an abnormal euphoric state and by delusions of grandeur.</li></ul><p><strong>Synonyms</strong></p><ul><li>gushing, gushy, unreserved, genial, outgoing, extroverted, sociable</li></ul>