1. Refined or imposing in manner or appearance; befitting a royal court
   "a stately gentleman";
   - courtly, formal
    
2. Impressive in size, manner, or appearance
   "stately columns";
   - baronial, imposing, noble
    
3. Of size and dignity suggestive of a statue
   "The stately oak tree dominated the landscape";
   - statuesque

Derived forms: statelier, stateliest

See also: dignified, impressive, tall