a vertically or longitudinally moving, rising, or expanding fluid body, as of smoke or water.
9.
a visible pattern of smoke resulting from emissions from a stack, flue, or chimney.
10.
Also called mantle plume.Geology. a deep-seated upwelling of magma within the earth's mantle. Compare diapir.
–verb (used with object)
11.
to furnish, cover, or adorn with plumes or feathers.
12.
(of a bird) to preen (itself or its feathers).
13.
to feel complacent satisfaction with (oneself); pride (oneself) (often fol. by on or upon): She sat before the mirror, pluming herself upon her beauty.
Origin: 1350–1400; earlier plome, plume, ME plume < MF < L plūma soft feather (> OE plūm-, in plūmfether downy feather)
A body of magma that rises from the Earth's mantle into the crust. ◇ If a plume rises to the Earth's surface, it erupts as lava. ◇ If it remains below the Earth's surface, it eventually solidifies into a body of rock known as a pluton.
An area in air, water, soil, or rock containing pollutants released from a single source. A plume often spreads in the environment due to the action of wind, currents, or gravity.