Noun has 2 senses

• capaciousness(n = noun.cognition) roominess - intellectual breadth; "his unselfishness gave him great intellectual roominess"; "the very capaciousness of the idea meant that agreement on fundamentals was unnecessary"


• capaciousness(n = noun.attribute) commodiousness, roominess, spaciousness - spatial largeness and extensiveness (especially inside a building); "his new office lacked the spaciousness that he had become accustomed to"; "roominess in this size car is always a compromise"; "the capaciousness of Santa's bag astounded the child"


Derived form adjective capacious₁