directional

[ dih-rek-shuh-nl, dahy- ]
/ dɪˈrɛk ʃə nl, daɪ- /
|

adjective

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.

Nearby words

  1. direction,
  2. direction angle,
  3. direction cosine,
  4. direction finder,
  5. direction number,
  6. directional derivative,
  7. directional drilling,
  8. directional microphone,
  9. directionless,
  10. directions

Origin of directional

First recorded in 1605–15; direction + -al1

Related formsdi·rec·tion·al·i·ty, noundi·rec·tion·al·ly, adverbun·di·rec·tion·al, adjective

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for directional


British Dictionary definitions for directional

directional

/ (dɪˈrɛkʃənəl, daɪ-) /

adjective

of or relating to a spatial direction
electronics
  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 takedirectional fashion looks
Derived Formsdirectionality, 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