1. relating to or indicating directions in space (Freq. 1) - a directional microphone • Ant: omnidirectional • Pertains to noun: direction • Derivationally related forms: directionality 2. relating to direction toward a (nonspatial) goal - he tried to explain the directional trends of modern science • Pertains to noun: direction 3. showing the way by conducting or leading; imposing direction on - felt his mother's directing arm around him - the directional role of science on industrial progress • Syn: directing, directive, guiding • Similar to: leading • Derivationally related forms: directive (for: directive), directiveness (for: directive), directivity (for: directive), direct (for: directive)