Meaning of DIRECTIONAL in English

[] adj (1881) 1: of, relating to, or indicating direction in space: a: suitable for detecting the direction from which radio signals come or for sending out radio signals in one direction only b: operating most effectively in a particular direction

2: relating to direction or guidance esp. of thought or effort -- n

Merriam-Webster English vocab.      Английский словарь Merriam Webster.