adjective

magnificent and imposing in appearance, size, or style.

a grand country house

magnificent,imposing,impressive,awe-inspiring,splendid,resplendent,superb,striking,monumental,majestic,glorious,palatial,stately,large,luxurious,sumptuous,lavish,opulent,princely,fit for a king,upmarket,upscale,fancy,posh,plush,classy,swanky,swish