n.1.The exterior wall; the outside surface, or appearance.
Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.
References in periodicals archive ?
No outwall and no adamant infixed with stars: no sphere.
Shippey, using references from World War II, points to ironic reflections of the uselessness of the Maginot line in the outwall around Minas Tirith, the Rammas Echor, and speaks of hints of "Vichyism and quislings, of puppet governments and demilitarized zones" (Road 128).
The outwall is made of an inner layer and outer layer, with the outer layer being carried on a side of the inner layer that faces the outward direction.