a. [f. WESTERN a. + -MOST. Cf. WESTERMOST.] Farthest towards the west; most westerly.
1703. Lond. Gaz., No. 3937/3. The Westernmost Rocks of the Minques.
1778. Forster, Observ. Voy. World, 197. There is a small species of scorpion in the tropical isles of the South-Sea, but more common to the Westernmost than the Society Isles.
1846. G. Warburton, Hochelaga, II. 191. Not more than four thousand square miles of all this westernmost country is capable of cultivation.
1884. Helen Jackson, Ramona, ii. The two westernmost rooms had been added on.
1892. J. L. Allen, Blue-Grass Region, etc. (1900), 259. Pine Mountain, the westernmost ridge of the Alleghany system.