Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

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

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • adj. Indicating direction.
  • adj. Of or relating to guidance or help.
  • n. Something that indicates direction, such as a turn signal.

from the GNU version of the Collaborative International Dictionary of English

  • adj. of or pertaining to direction (definition 2).
  • adj. serving to indicate direction.
  • adj. transmitting radio signals in a specific direction, or receiving signals only from a narrow angle of directions, thus serving to indicate the direction from which radio signals are coming. Used of antennas.

from The Century Dictionary and Cyclopedia

  • Pertaining or relating to direction.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • adj. relating to direction toward a (nonspatial) goal
  • adj. relating to or indicating directions in space
  • adj. showing the way by conducting or leading; imposing direction on

Etymologies

direction +‎ -al (Wiktionary)

Examples

  • 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.

    Boing Boing

  • I once heard it was found to be better in directional terms than the more glamorous US-style wail.

    The Art Of Noise « POLICE INSPECTOR BLOG

  • But forecasting long-term directional change is possible by identifying trends through an analysis of deep history rather than of the shallow past.

    Ten Trends To Watch In 2006

  • The Puerto Rico Electric Power Authority is barely starting in directional drilling.

    Directional Drilling Contractors

  • The data provided by the CFTC provides some of the best intermediate to long-term directional indicators available, particularly when an extreme is hit.

  • We will continue to offer longer-term directional indications with a primary focus on growth drivers and relevant factors.

  • Until and unless this uptrend is broken to the downside (with a break below 1.0500), the current medium-term directional bias continues to be bullish.

    FXstreet.com

  • We recommend staying on the sidelines at current levels with no clear short-term directional bias.

    Currency Trading News by DailyFX

  • Until this level is taken out the near-term directional bias remains neutral.

    The Big Picture

  • Long term directional movements are obvious in the major currency pairs and Trend Following captures these moves.

    TradingMarkets

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