The property of some seismic sources whereby the amplitude, frequency, velocity or other property of the resulting seismic waves varies with direction. A directional charge, such as a length of primer [..]

The ratio of the radiation intensity from an antenna, in a given direction, to the radiation intensity averaged over all directions. The directivity is equal to the antenna gain plus antenna dissipati [..]

Directivity is an effect of a fault rupturing whereby earthquake ground motion in the direction of rupture propagation is more severe than that in other directions from the earthquake source. Directiv [..]

The ability of a speaker or horn to direct sound to a given area which can be described by its directivity factor (Q).

(n) the property of a microphone or antenna of being more sensitive in one direction than in another(n) the quality of being directive

The ability of an antenna to radiate or receive more energy in some directions than in others. The degree of sharpness of the antenna beam.

Directivity is a measure of the quality of the directional coupler. Directivity = Coupling-Isolation