igneous

adjective
ig·​ne·​ous | \ˈig-nē-əs \

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 activity

b : formed by solidification of magma igneous rock

Examples of igneous in a Sentence

Recent Examples on the Web

This whorl of igneous material became a vineyard 20 years ago, when brothers Peter and Arpad Molnar first planted Cabernet Sauvignon here. Esther Mobley, San Francisco Chronicle, "The rise of the Red Hills of Lake County," 1 June 2018 The massive cascade tumbles over black-brown basalt rock, an igneous rock born of billion-year-old lava flows. Chelsey Lewis, USA TODAY, "Seven natural wonders in Wisconsin," 16 Mar. 2018 The massive cascade tumbles over black-brown basalt rock, an igneous rock born of billion-year-old lava flows. Chelsey Lewis, USA TODAY, "Seven natural wonders in Wisconsin," 16 Mar. 2018 The massive cascade tumbles over black-brown basalt rock, an igneous rock born of billion-year-old lava flows. Chelsey Lewis, USA TODAY, "Seven natural wonders in Wisconsin," 16 Mar. 2018 The massive cascade tumbles over black-brown basalt rock, an igneous rock born of billion-year-old lava flows. Chelsey Lewis, USA TODAY, "Seven natural wonders in Wisconsin," 16 Mar. 2018 The massive cascade tumbles over black-brown basalt rock, an igneous rock born of billion-year-old lava flows. Chelsey Lewis, USA TODAY, "Seven natural wonders in Wisconsin," 16 Mar. 2018 The massive cascade tumbles over black-brown basalt rock, an igneous rock born of billion-year-old lava flows. Chelsey Lewis, USA TODAY, "Seven natural wonders in Wisconsin," 16 Mar. 2018 The massive cascade tumbles over black-brown basalt rock, an igneous rock born of billion-year-old lava flows. Chelsey Lewis, USA TODAY, "Seven natural wonders in Wisconsin," 16 Mar. 2018

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.

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First Known Use of igneous

1664, in the meaning defined at sense 1

History and Etymology for igneous

Latin igneus, from ignis fire; akin to Sanskrit agni fire

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The first known use of igneous was in 1664

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More Definitions for igneous

igneous

adjective

English Language Learners Definition of igneous

: formed when hot, liquid rock cools and becomes hard

igneous

adjective
ig·​ne·​ous | \ˈig-nē-əs \

Kids Definition of igneous

: formed by hardening of melted mineral material within the earth igneous rock

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