Capacious, a.
Etymology: [L. capaz, -acis, fr. capere to take. See Heave.]
1. Having capacity; able to contain much; large; roomy; spacious; extended; broad; as, a capacious vessel, room, bay, or harbor. In the capacious recesses of his mind. Bancroft.
2. Able or qualified to make large views of things, as in obtaining knowledge or forming designs; comprehensive; liberal. "A capacious mind." Watts.
Shades of meaning
Fernald has no entry of its own for capacious; he lists it under large.
He lists it without comment; the entries above explain its neighbors.