English Reference
adjective

uncertain

adj.
US /ənˈsɝtən/ UK /ʌnsˈɜːtən/ un·cer·tain

  1. 01 B1 Intermediate

    feeling that you do not know something for sure or cannot rely on it.

    describing a subjective state of doubt or lack of confidence regarding a fact or outcome.

    Simple

    She was uncertain about which road to take at the fork.

    In context

    Investors remained uncertain about the market's recovery, leading to a significant decrease in high-risk trading throughout the quarter.

  2. 02 B1 Intermediate

    not known or fixed; something that might change or is not clear yet.

    describing an objective situation that is not established, confirmed, or clearly defined.

    Simple

    The exact date of the party is still uncertain because of the weather.

    In context

    The origins of the manuscript remain uncertain, as carbon dating has provided conflicting results regarding the age of the parchment.

  3. 03 B2 Upper Intermediate

    likely to change often or behave in a way you cannot predict.

    subject to change or variation; lacking a predictable pattern or stability.

    Simple

    The weather in the mountains is very uncertain, so bring a jacket.

    In context

    The political climate remains uncertain, with shifting alliances making it difficult for analysts to forecast the outcome of the upcoming election.

Usage uncertain future


From Middle English uncerteyn. By surface analysis, un- + certain.

Etymology adapted from Wiktionary, available under CC BY-SA 4.0.

This entry
Origin Middle English uncerteyn
Level B1 · Intermediate
Frequency Frequent
Updated