Lava/ˈlɑːvə/ Definition 1 of 1Pro Tip 1/3Naturally Destructive Lava is often associated with destruction since it can burn and cover everything in its path. The village was destroyed by lava. Pro Tip 2/3Cooled Form When lava cools and hardens, it forms volcanic rock that can create new landforms. The hardened lava created a new island. Pro Tip 3/3Metaphorical Usage The word 'lava' can be used metaphorically to describe intense emotions like anger. His anger was like lava, uncontrollable and fiery.