- a river that flows into an underground passage or sinkhole.
Origin of lost river
An Americanism dating back to 1835–45
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for lost river
The ambulance is leaving Linkville, escorted by a mounted guard of citizens, destined to the Lost-river battle-ground.
The bones of the only brave who fell in Lost-river battle answer, Here.