[ uhn-shoor, ‐shur ]
See synonyms for unsure on Thesaurus.com
  1. not certain or confident: He arrived at the party unsure of his welcome.

  2. unknown or liable to change; not determined or definite:The monthly trend for this stock is still unsure, but the daily trend is upward.What happened next is unsure.

Origin of unsure

First recorded in 1400–50; Middle English unseur(e) “unsafe; precarious; uncertain”; un-1 + sure

Words Nearby unsure

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2024

How to use unsure in a sentence

British Dictionary definitions for unsure


/ (ʌnˈʃʊə) /

  1. lacking assurance or self-confidence

  2. (usually postpositive) without sure knowledge; uncertain: unsure of her agreement

  1. precarious; insecure

  2. not certain or reliable

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