<p><strong>Adjective:</strong></p><ul><li>Having considerable weight; heavy; ponderous: a weighty bundle.</li><li>Burdensome or troublesome: the weightier cares of sovereignty.</li><li>Important or momentous: weighty negotiations.</li><li>Having or exerting influence, power, etc.; influential: a weighty merchant of Boston.</li></ul><p><strong>Synonyms:</strong></p><ul><li>Consequential, grave, serious, significant</li></ul><p><strong>Antonyms:</strong></p><ul><li>Light, unimportant</li></ul>