Meaning of DIRECTIONAL in English

DIRECTIONAL

1.

If something such as a radio aerial, microphone, or loudspeaker is ~, it works most effectively in one direction, rather than equally in all directions at once. (TECHNICAL)

Dish aerials are highly ~...

ADJ

2.

Directional means relating to the direction in which something is pointing or going. (TECHNICAL)

Jets of compressed air gave the aircraft lateral and ~ stability.

ADJ: usu ADJ n

Collins COBUILD.      Толковый словарь английского языка для изучающих язык Коллинз COBUILD (международная база данных языков Бирмингемского университета) .