Definitions for "Lava flow"
Mass or stream of molten rock that flows on the earth's surface under the influence of gravity; also, the solidified product of such a stream
A lava flow can be described as an outpouring of molten rock onto the Earth's surface forming a river or sheet.
Lava flows are masses of molten (liquid) rock that pour onto the Earth's surface during an eruption. Moving lava and the resulting solidified deposit are referred to as lava flows.