The now-extinct Southern Athabascan language spoken by the Plains Apache people.

A division of the Miwok people, who resided in the general area of modern San Joaquin County and parts of Sacramento Valley, California. / The Utian (Penutian) language spoken by this people.

Alternative spelling of plainsong

plural of gibber plain

(Australia) A large desert pavement.

(nautical) The navigation of waters free from hazards or unfavourable winds. / (nautical) Obsolete spelling of plane sailing

(by extension) simple, straightforward, or easy

A large region of North America formed by the collision of cratons in the Paleoproterozoic.

a large expanse of very flat and smooth ocean floor, usually found at depths of 4,600 to 5,500 meters (15,000 to 18,000 feet).

(rail transport) a stretch of railway track that does not have any junctions, crossovers or points on it.