Definition of Igneous

• produced under conditions involving intense heat; "igneous rock is rock formed by solidification from a molten state; especially from molten magma"; "igneous fusion is fusion by heat alone"; "pyrogenic strata"
• produced by the action of fire or intense heat; "rocks formed by igneous agents"
• like or suggestive of fire; "the burning sand"; "a fiery desert wind"; "an igneous desert atmosphere"