English Lexicon

Uncertainty

/ʌnˈsɜː.tən.ti/
nounCEFR B2 (Upper)Top #2450 frequency
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Comprehensive Definitions & Senses

2 senses
As noun
  1. 1

    The state of being uncertain; doubt or lack of conviction.

    "There was a sense of uncertainty in the air as the team awaited the results."
  2. 2

    A situation or condition that is not known or predictable.

    "The uncertainty of the weather made planning the outdoor event difficult."

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Antonyms & Contrasting Words (1)

Linguistic Origin & Historical Etymology

Derived from the Late Middle English word 'uncertainte', combining the prefix un- (meaning 'not') with certainty, which traces back to Old French 'certainté' and Latin 'certus'. Over centuries, it evolved from expressing a personal lack of conviction to encompassing objective unpredictability in scientific and probabilistic contexts.

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