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Related to directional: directional antenna, Directional microphone, Directional coupler, Directional derivative, directional cloning, directional hypothesis
a. having or relating to an increased sensitivity to radio waves, sound waves, nuclear particles, etc., coming from a particular direction
b. (of an aerial) transmitting or receiving radio waves more effectively in some directions than in others
2. Physics Electronics
a. concentrated in, following, or producing motion in a particular direction
b. indicating direction
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005
directionalIn one direction. Contrast with omnidirectional.
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