lava

1. 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. (countable, uncountable)
2. A body of lava. (countable)
3. Solidified lava. (countable, dated, uncountable)
4. Magma. (countable, informal, uncountable)
5. A shade of red, named after the volcanic lava. (countable, uncountable)
6. Hot water. (colloquial, countable, figuratively, uncountable)

Plural lavas