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Definition of unsure - 2 dictionary results
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un·sure   (ŭn-shŏŏr', -shûr')   
adj.  

  1. Lacking confidence.

  2. Uncertain of the facts.

  3. Precarious; unstable; unreliable.

un·sure'ly adv.
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Save $426 When You Switch To State Farm. Get A Free Auto Quote Today.
www.StateFarm.com
Word Origin & History

unsure 
Use unsure in a Sentence
c.1400, "not safe against attack," also "lacking certainty," from un- (1) "not" + sure.
Online Etymology Dictionary, © 2001 Douglas Harper
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