“An extension of a building at right angles to the main block.” N.E.D.
1883. An L of the house where she was born is still standing.—G. M. White, ‘The Local Association of Whittier’s Poems,’ Harper’s Mag., lxvi. p. 358/2 (Feb.). (N.E.D.)
1890. Far ahead he saw a wood on the edge of the prairie, and drawing nearer, a large two-storied white frame house with a front veranda and an ell came in view among the few trees which grew between it and the plain.—W. N. Harben, ‘Almost Persuaded,’ p. 21 (N.Y.).
