plume definition

1. anything that resembles a feather in shape or lightness
• examples: a plume of smoke
• examples: grass with large plumes
2. a feather or cluster of feathers worn as an ornament
3. deck with a plume
• examples: a plumed helmet
4. form a plume
• examples: The chimneys were pluming the sky
• examples: The engine was pluming black smoke