Definitions

1. adjective

of or relating to fire or heat; formed by the cooling and solidification of molten rock

“The igneous rocks in the mountain range were formed millions of years ago.”

2. noun

a type of rock that is formed by the cooling and solidification of molten rock

“The geologist studied the igneous rock samples from the new excavation site.”

3. noun

a type of magma that is rich in minerals and has a high temperature

“The igneous magma deep within the Earth’s crust was responsible for the volcanic eruption.”