Definition of phase angle:
(n) :
(wave physics) Angular displacement of a sinusoid from a reference point or reference time.
(n) :
(electronics) Angular component of the vector representation of a sinusoid.
(n) :
(mathematics) Angular component of a polar coordinate representation.
(n) :
(astronomy) Angle between incident light and reflected light.
(n) :
(mathematics) Angular component of a vector.