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[dih-rek-shuh-nl, dahy-] /dɪˈrɛk ʃə nl, daɪ-/
of, relating to, or indicating direction in space.
Radio. adapted for determining the direction of signals received, or for transmitting signals in a given direction:
a directional antenna.
of, relating to, or providing guidance or leadership.
Origin of directional
First recorded in 1605-15; direction + -al1
Related forms
directionality, noun
directionally, adverb
undirectional, adjective Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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Examples from the Web for directional
Contemporary Examples
Historical Examples
  • But we can't control the directional and dimensional scope of the warp.

    Circus Alan Edward Nourse
  • The words spoke clearly in his mind but there was no directional source.

  • And turning to directional Stability, she politely asked him what he preferred to do.

  • Maybe they could get a directional fix on his signal and home on it.

    Way of a Rebel Walter M. Miller
  • The directional pattern of the country's foreign trade has conformed to the general observation that trade follows aid.

    Area Handbook for Albania Eugene K. Keefe
  • directional Stability is its stability about its vertical axis, and without which it would have no tendency to keep its course.

British Dictionary definitions for directional


/dɪˈrɛkʃənəl; daɪ-/
of or relating to a spatial direction
  1. having or relating to an increased sensitivity to radio waves, sound waves, nuclear particles, etc, coming from a particular direction
  2. (of an aerial) transmitting or receiving radio waves more effectively in some directions than in others
(physics, electronics)
  1. concentrated in, following, or producing motion in a particular direction
  2. indicating direction
indicating the direction something, such as a fashion trend, might take: directional fashion looks
Derived Forms
directionality, noun
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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