də̇ˌrekˈtivəd.ē, (ˌ)dīˌ- noun
( -es )
1. : directiveness
2. : the property of being directional or a measure of that property (as the front-to-back ratio of microphone response) : orientation ; specifically : a measure of the property in an antenna, loudspeaker, microphone, or other transducer used for sound transmission or reception by which its performance in one direction is better than that in another