Pronunciation: (di-rek'shu-nl, dī-), [key]
1. of, pertaining to, or indicating direction in space.
2. Radio.adapted for determining the direction of signals received, or for transmitting signals in a given direction: a directional antenna.
3. of, pertaining to, or providing guidance or leadership.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.