WordWeb Online

1. Powerfully persuasive
   "a weighty argument";
   - cogent, telling
    
2. Of great gravity or crucial import; requiring serious thought
   "the weighty matters to be discussed at the peace conference";
   - grave, grievous, heavy
    
3. Weighing heavily on the spirit; causing anxiety or worry
   "weighty problems"
    
4. Excessively fat
   "a weighty man";
   - corpulent, obese, rotund, lardy [informal], overweight, porky [informal]
    
5. Having relatively great weight; heavy
   "a weighty load"; "a weighty package"

Derived forms: weightier, weightiest

See also: fat, heavy, important, of import, persuasive, suasive [rare]

Antonym: weightless

Encyclopedia: Weighty