[ uhn-sur-tn ]
/ ʌnˈsɜr tn /


Origin of uncertain

Middle English word dating back to 1250–1300; see origin at un-1, certain

synonym study for uncertain

1. Uncertain, insecure, precarious imply a lack of predictability. That which is uncertain is doubtful or problematical; it often involves danger through an inability to predict or to place confidence in the unknown: The time of his arrival is uncertain. That which is insecure is not firm, stable, reliable, or safe, and hence is likely to give way, fail, or be overcome: an insecure foundation, footing, protection. Precarious suggests great susceptibility to failure, or exposure to imminent danger: a precarious means of existence.


un·cer·tain·ly, adverb un·cer·tain·ness, noun

Example sentences from the Web for uncertain

British Dictionary definitions for uncertain

/ (ʌnˈsɜːtən) /


not able to be accurately known or predicted the issue is uncertain
(when postpositive, often foll by of) not sure or confident (about) a man of uncertain opinion
not precisely determined, established, or decided uncertain plans
not to be depended upon; unreliable an uncertain vote
liable to variation; changeable the weather is uncertain
in no uncertain terms
  1. unambiguously
  2. forcefully

Derived forms of uncertain

uncertainly, adverb uncertainness, noun

Idioms and Phrases with uncertain


see in no uncertain terms.