from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A long-range navigational system in which position is determined by an analysis involving the time intervals between pulsed radio signals from two or more pairs of ground stations of known position.
from the GNU version of the Collaborative International Dictionary of English
- n. A system of electronic navigation in which a vessel or aircraft determines its latitude and longitude by measuring the time differences between low frequency radio transmissions from two stationary transmitters (slaves) and a stationary master transmitter. Contrary to the name, Loran is a medium range system, usually effective for no more than a few hundred miles from shore. The first commercial system was called Loran A; the latest (and final) development is Loran C.
lo(ng-)ra(nge) n(avigation).(American Heritage® Dictionary of the English Language, Fourth Edition)