American Heritage Dictionary
(1)
Century Dictionary
GNU Webster's 1913
WordNet
(2)
Elsewhere on the web
Meeting attendance is lackluster, and those who do come rarely speak up.— Latest News - UPI.com
(Gates's speech and the conversation between Gates and Buffett) are rather lackluster, the all-star cast of writers makes up for it in the short essays that follow.— City Journal
Sergio Trujillo's choreography is mostly lackluster, aside from some acrobatic male hoofing in the second-act '' Crapshooters 'Ballet.' '— EW.com: Today's Latest Headlines
It was lackluster, his first chorus was painfully flat, and Rascall Flatts are terrible. meg Tue, Mar 31, 2009 at 07: 32 PM EST— Entertainment Weekly's PopWatch
First off, most of the free content is lackluster -- the video quality is poor, many of the clips are short and most of the content just isn't compelling.

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