Definitions for LORANˈlɔr æn, ˈloʊr-
Random House Webster's College Dictionary
lo•ranˈlɔr æn, ˈloʊr-(n.)
(sometimes cap.) a navigational system for locating one's position by determining the time displacement between radio signals from two known stations.
Origin of loran:
1940–45, Amer.; lo(ng)ra(nge)n(avigation)
Dictionary of Military and Associated Terms
A long-range radio navigation position fixing system using the time difference of reception of pulse type transmissions from two or more fixed stations. This term is derived from the words long-range electronic navigation.