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Meaning of lackluster

lack•lus•ter

Pronunciation: (lak'lus"tur), [key]
— adj.
  1. lacking brilliance or radiance; dull: lackluster eyes.
  2. lacking liveliness, vitality, spirit, or enthusiasm: a lackluster performance.
—n.
  1. a lack of brilliance or vitality.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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