Meaning of DIRECTIONAL in English

adjective Date: 1842 of, relating to, or indicating direction in space:, suitable for detecting the direction from which radio signals come or for sending out radio signals in one direction only , operating most effectively in a particular direction , relating to direction or guidance especially of thought or effort, ~ity noun

Merriam Webster. Explanatory English dictionary Merriam Webster.      Толковый словарь английского языка Мерриам-Уэбстер.