Position occupied at any instant in its cycle by a periodic wave; a part of a sound wave or signal with respect to its passage in time. One signal is said to be in phase with, or to lead, or to lag, another reference signal.
"I received my order last week and I am thrilled with the results. I am looking very much forward to getting the two Marais and Miranda CDs to my father. He has not heard his long cherished music in over 12 years. Being disabled, music is one of the few pleasures he can still enjoy. There is no doubt that you will be seeing more LPs from myself ..."