1. relating to or denoting igneous rock formed deep underground from slowly cooled magma
Usage: geology
2. relating to the underworld or the god Pluto
Usage: mythology; literary

Examples

• Granite is a common plutonic rock found in mountain ranges.
• The plutonic intrusion cooled slowly beneath the Earth’s surface.
• Geologists studied the plutonic formations in the canyon walls.
• The plutonic rocks showed large crystal structures due to slow cooling.
• Ancient myths described plutonic realms deep beneath the earth.
• The poet used plutonic imagery to describe the dark underworld.