Term used to describe the position of a sound source in reference to the microphone recording the source. Generally, a microphone will record best when the source is directly in front of it, but since moving the microphone off-axis results in coloration of the signal, engineers sometimes use it to good effect.
hello there. i put another post similar to this one up before but this one is more specific.
if a handheld vocal mic has a polar chart like this one
(if the link doent work its the audio-technia ae6100)