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| di·rec·tion·al [ di rékshən'l, dī rékshən'l ] |
adjective |
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1. relating to direction: showing, concerned with, or dependent on direction
  Use your directional lights to indicate the way you plan to turn.
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2. relating to control of something: showing or relating to the management or control of somebody's work, behavior, or way of thinking
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3. indicating trend: showing the future direction in which something might go
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4. electronics more efficient in one direction: more efficient in a specific direction for transmitting and receiving sound waves, nuclear particles, light, or radio waves
a directional antenna
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