General Definition: 1. Of a liquid, to flow or spurt out of a container or central location and then to flow out over the sides, such as boiling water in a pot or lava from a volcano, or any thing or any action directly or indirectly associated with this. As a Noun: 1. A kind of rock which comes out of a volcano in the form of a very hot liquid, and which gradually cools and becomes solid. English = lava.