Pronunciation: (di-pär'chur), [key]
1. an act or instance of departing: the time of departure; a hasty departure.
2. divergence or deviation, as from a standard, rule, etc.: a departure from accepted teaching methods.
a. the distance due east or west traveled by a vessel or aircraft.
b. See point of departure.
4. Survey.the length of the projection, on the east-west reference line, of a survey line.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.