Directional meaning

dĭ-rĕkshə-nəl, dī-
Of or indicating direction.

An automobile's directional lights.

adjective
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Capable of receiving or sending signals in one direction only.
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Relating to guidance in effort, behavior, or thought.

Directional training.

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A directional signal.
noun
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Of, aimed at, or indicating (a specific) direction.
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Designed for radiating or receiving radio signals most effectively in one or more particular directions.

A directional antenna.

adjective
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Designed to pick up or send out sound most efficiently in one direction.
adjective
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In one direction. Contrast with omnidirectional.
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Indicating direction.
adjective
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Of or relating to guidance or help.
adjective
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Something that indicates direction, such as a turn signal.
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Origin of directional