A stream of water which flows in a channel from high ground to low ground and ultimately to a lake or the sea, except in a desert area where it may dwindle away to nothing.
|RIVER||isa||FLOWING BODY OF WATER|
|RIVER||broader||RIVER OR WATER|
|FLOWING BODY OF WATER||instanceof||RIVER|
|RIVER OR WATER||narrower||RIVER|
|Id||Concept in source||Conceptlist|