capaciousness n intellectual breadth the very capaciousness of the idea meant that agreement on fundamentals was unnecessary n spatial largeness and extensiveness (especially inside a building) the capaciousness of Santa's bag astounded the child Usage(s) This Anna has the capaciousness and subtlety that the film versions, good as they were, necessarily lacked. The avowed imperialist assumes that if not his belly, at least his pocket will have the requisite capaciousness. He was called a gypsy for his capaciousness. Synonym(s) roominess spaciousness commodiousness