American English

Definition of plume noun from the Oxford Advanced American Dictionary



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  1. 1a cloud of something that rises and curves upward in the air a plume of smoke A radioactive plume could reach the city within hours.
  2. 2a large feather a black hat with an ostrich plume
  3. 3a group of feathers or long thin pieces of material tied together and often used as a decoration The red plume on the horse's head was nodding to the rhythm of its steps. see also nom de plume
See the Oxford Advanced Learner's Dictionary entry: plume

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