directional
adjective
1. relating to or indicating directions in space
- a directional microphone
2. relating to direction toward a (nonspatial) goal
- he tried to explain the directional trends of modern science
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
noun
1. Something that indicates direction, such as a vehicle's turn signal.