Adjective
1. having relatively great weight; heavy;
"a weighty load""a weighty package"2. of great gravity or crucial import; requiring serious thought;
"grave responsibilities""faced a grave decision in a time of crisis""a grievous fault""heavy matters of state""the weighty matters to be discussed at the peace conference"3. weighing heavily on the spirit; causing anxiety or worry;
"weighty problems"4. excessively fat;
"a weighty man"5. powerfully persuasive;
"a cogent argument""a telling presentation""a weighty argument"