Less definitely as to direction (e.g. where length is not applicable, or not in question): Of great extent, extensive, wide, ample, spacious.

Having great spatial extent, esp. horizontally; vast, extensive, spacious, ample. In later use chiefly as a conventional epithet of words denoting…

Extensive in transverse dimension; broad, wide. Frequently in conjunction with long. Now only as implied in sense A. 5.

Spread out, broad. Obsolete.

Of a road, street, courtyard, etc.: wide, broad; large, open.

as wide as a basin (cf. saucer-eyed adj. at saucer, n. adj.compounds 3).

Broad, wide.