· having relatively great weight; heavy; "a weighty load"; "a weighty package"

Antonym(s): weightless

· powerfully persuasive; "a cogent argument"; "a telling presentation"; "a weighty argument"

Synonym(s): cogent, telling

· 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"

Synonym(s): grave, grievous, heavy

· weighing heavily on the spirit; causing anxiety or worry; "weighty problems"

· excessively fat; "a weighty man"

Synonym(s): corpulent, obese, rotund