Meaning of angle of lead

an'gle of lead'

Pronunciation: (lēd), [key]
— Physics, Elect. Physics,Elect.
  1. the phase difference, expressed in degrees, by which one sinusoidal function is moving ahead of a second having the same period, as alternating voltage moving ahead of the alternating current.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.