a point in the SW U.S., at the intersection of 37° N lat. and 109° W long., where the boundaries of four states—Arizona, Utah, Colorado, and New Mexico—meet: the only such point in the U.S.
Pronunciation: (fôr'kôr'nurz, fōr'-), [key]
—n. (used with a sing. or pl. v.) Northern and Western U.S.
a place where roads cross at right angles; a crossroads. Also,four' cor'ners.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.