The summit or highest point of anything; the top; e. g., in mining law, “apex of a vein.” See Larkin v. Upton, 144 U. S. 19, 12 Sup. Ct 614, 36 L. Ed. 330; Stevens v. Williams, 23 Fed. Cas. 40; Dug- gan v. Davey, 4 Dak. 110, 26 N. W. 887.
Black’s Law Online Dictionary
