weighty adj
1: having relatively great weight; heavy; "a weighty load"; "a weighty package" [ant: weightless]
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" [syn: grave, grievous, heavy]
3: weighing heavily on the spirit; causing anxiety or worry; "weighty problems"
4: excessively fat; "a weighty man" [syn: corpulent, obese, rotund]
5: powerfully persuasive; "a cogent argument"; "a telling presentation"; "a weighty argument" [syn: cogent, telling]