lava /ˈlɑːvə/ noun6 •The molten rock ejected by a volcano from a vent such as a crater or fissure; magma that has breached the surface of the earth.Marine iguanas line the shores of the islands, and are usually seen sprawled over lava rocks near the sea. — 1991 •A body of lava. •Solidified lava.I leant forward to see him better, and a piece of lava, detached by my hand, went pattering down the slope. — 1896 •(informal, nonstandard) Magma. •A shade of red, named after the volcanic lava. •(informal, figurative) Hot water. formslavas