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lackluster

[lak-luhs-ter]
adjective
  1. lacking brilliance or radiance; dull: lackluster eyes.
  2. lacking liveliness, vitality, spirit, or enthusiasm: a lackluster performance.
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noun
  1. a lack of brilliance or vitality.
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Also especially British, lack·lus·tre.

Origin of lackluster

First recorded in 1590–1600; lack + luster1
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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British Dictionary definitions for lacklustre

lacklustre

US lackluster

adjective
  1. lacking force, brilliance, or vitality
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Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for lacklustre

chiefly British English spelling of lackluster (q.v.); for spelling, see -re.

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lackluster

adj.

also lack-luster, c.1600, first attested in "As You Like It," from lack + luster. Combinations with lack- were frequent in 16c., e.g. lackland (1590s), of a landless man; lack-Latin (1530s), of an ignorant priest.

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Online Etymology Dictionary, © 2010 Douglas Harper