Pronunciation: (hād), [key]
—n., v., had•ed, had•ing.
1. Geol.the angle between a fault plane and the vertical, measured perpendicular to the strike of the fault; complement of the dip.
2. Mining.the inclination of a vein or seam from the vertical.
(of a fault, vein, or seam) to incline from a vertical position.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.