a. large in volume or bulk; large in number or quantity, especially of discourse
A caftan is a voluminous garment; most people wearing one look as if they're draped in a small tent.
Sentence in Classic:
Gerald knelt beside her, and Scarlett and Suellen took their accustomed places on the opposite side of the table, folding their voluminous petticoats in pads under their knees, so they would ache less from contact with the hard floor.
Gone With The Wind By Margaret Mitche Context
The equipages are as varied as the company and attract as much attention, especially the low basket barouches in which ladies drive themselves, with a pair of dashing ponies, gay nets to keep their voluminous flounces from overflowing the diminutive vehicles, and little grooms on the perch behind.
Little Women By Louisa May Alcott Context
Dares most of all shrinks far back in horror, and the noble son of Anchises turns round this way and that their vast weight and voluminous folds.