Definition of igneous
1 : of, relating to, or resembling fire : fiery
2a : relating to, resulting from, or suggestive of the intrusion or extrusion of magma or volcanic activityb : formed by solidification of magma igneous rock
Recent Examples of igneous from the Web
The acid crumbs of loam, the granular pink rock, its igneous veins, the sea-fans of dry moss, the blackish and then the graying bristles on the back of his neck.
Includes study of igneous, sedimentary and ore samples.
Even more frightening is the prospect that another kind of super volcano, called a large igneous province (LIP), could become active sometime in the future.
These example sentences are selected automatically from various online news sources to reflect current usage of the word 'igneous'. Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.
Origin and Etymology of igneous
Latin igneus, from ignis fire; akin to Sanskrit agni fire
First Known Use: 1664
IGNEOUS Defined for English Language Learners
Definition of igneous for English Language Learners
: formed when hot, liquid rock cools and becomes hard
IGNEOUS Defined for Kids
Definition of igneous for Students
: formed by hardening of melted mineral material within the earth igneous rock
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