Longman Dictionary of Contemporary English
The Collaborative International Dictionary
directional \directional\ adj.
of or pertaining to direction (definition 2).
serving to indicate direction.
(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 directional antenna.
Wiktionary
a. 1 Indicating direction. 2 Of or relating to guidance or help. n. Something that indicates direction, such as a vehicle's turn signal.
WordNet
adj. relating to or indicating directions in space; "a directional microphone" [ant: omnidirectional]
relating to direction toward a (nonspatial) goal; "he tried to explain the directional trends of modern science"
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]
Wikipedia
Usage examples of "directional".
Maybe then we could at least have gotten a directional bearing for the LAC sweeps.
The only thing those transmissions could be were scraps of backscatter from Manticoran directional FTL transmissions.
And if that center point had a directional field converging into, it, then the same lines would have to leave it again.
The directional example was, of course, only a limited way of trying to conceive it.
He raised his hands and directional speakers in the walls of the converted cargo cell amplified his throat-miked words.
Directional thrusters gimbaled to their limits, and areas of stalled air coruscated on the planform display of the dynamic pressure distribution.
If we use the directional beam, he flashes along it, obtains a reconstructor and again reaches his planet first.
If we use the directional beam, he flashes along it, obtains a reconstructor, and again reaches his planet first.
The Summoner was the directional point, much as the gazebo in Elysian had been.
As I understand it, he gets directional signals from a diagonally upward direction, but they could be sent from somewhere near here and bounce off the Heaviside layer so as to strike his antenna from that angle.
The thug whooped with glee as his swoop shot past over her, a triumphal shout that turned into a squawk of surprise as Shada tucked her legs to her chest and kicked hard straight up, catching the swoop just forward of the directional thrust nozzles and bucking the swooper right out of the saddle.
Unlike the standard high-frequency communications, which were vulnerable to foreign direction-finding antennas, the moon-bounce signal was virtually undetectable because it used hard-to-intercept directional microwave signals.
We passed a complex of directional signs: Point Sur, Pfeiffer Beach, Big Sur Lodge, Ventana, the Esalen Institute.
His fingers played over the controls and the directional gyroscopes began to spin, and the hull turned about them.
Both men remembered a recent Special Branch blunder which had involved the use of directional microphones in one of their stake-outs.