adj.
Pronunciation: ' ig-n ē - ə s
Function: adjective
Etymology: Latin igneus, from ignis fire; akin to Sanskrit agni fire
Date: 1664
1 : of, relating to, or resembling fire : FIERY
2 a : relating to, resulting from, or suggestive of the intrusion or extrusion of magma or volcanic activity b : formed by solidification of magma < igneous rock>