3. [syn: directing, directional, directive, guiding]
The Collaborative International Dictionary of English v.0.48:
directional \directional\ adj.
1. of or pertaining to direction (definition 2).
2. serving to indicate direction.
3. (Radio) transmitting radio signals in a specific
direction, or receiving signals only from a narrow angle
of directions, thus serving to indicate the direction from
which radio signals are coming. Used of antennas; as, a
WordNet (r) 3.0 (2006):
adj 1: relating to or indicating directions in space; "a
directional microphone" [ant: omnidirectional]
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" [syn:
directing, directional, directive, guiding]