Definition of "directional" []

• Of or indicating direction: an automobile's directional lights. (adjective)
• Electronics Capable of receiving or sending signals in one direction only. (adjective)
• Relating to guidance in effort, behavior, or thought: directional training. (adjective)
• Serving to point the future direction, as of fashion: "A directional group of sweater knit colors are winter pastels” ( Women's Wear Daily). (adjective)
• A directional signal. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "One of the objects of this invention is to provide a tank having an extensible leg capable of imparting a series of vertical oscillations to the tank, and having means to vary the angle of inclination of the leg to obtain directional movement of the tank."
• "I once heard it was found to be better in directional terms than the more glamorous US-style wail."
• "But forecasting long-term directional change is possible by identifying trends through an analysis of deep history rather than of the shallow past."