Spacious, a.
Etymology: [L. spatiousus: cf. F. spacieux. See Space, n.]
1. Extending far and wide; vast in extent. "A spacious plain outstretched in circuit wide." Milton.
2. Inclosing an extended space; having large or ample room; not contracted or narrow; capacious; roomy; as, spacious bounds; a spacious church; a spacious hall. -- Spa"cious*ly, adv. -- Spa"cious*ness, n.
Shades of meaning
Fernald has no entry of its own for spacious; he lists it under large.
He lists it without comment; the entries above explain its neighbors.