directional (Adjective) — Relating to or indicating directions in space. ex. "a directional microphone"
directional (Adjective) — Relating to direction toward a (nonspatial) goal. ex. "he tried to explain the directional trends of modern science"
directional (Adjective) — Showing the way by conducting or leading; imposing direction on. ex. "the directional role of science on industrial progress"