Definition of Outshine

Babylon English Dictionary
be shinier than; shine longer than; surpass, excel
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Outshine Definition from Language, Idioms & Slang Dictionaries & Glossaries
Webster's Revised Unabridged Dictionary (1913)
(v. t.)
To excel in splendor.
  
(v. i.)
To shine forth.
  
Webster's Revised Unabridged Dictionary (1913), edited by Noah Porter. About
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outshine
\out*shine"\ (?), v. i. to shine forth. "bright, outshining beams."
outshine
\out*shine"\, v. t. to excel in splendor. a throne of royal state, which far outshone the wealth of ormus and of ind.

WordNet 2.0

Verb
1. shine brighter than; "What star outshines the sun?"
(hypernym) shine, beam
2. attract more attention and praise than others; "This film outshone all the others in quality"
(hypernym) surpass, outstrip, outmatch, outgo, exceed, outdo, surmount, outperform
(hyponym) upstage