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Definition of improbability

improbability

/ˌɪmˌprɑː.bəˈbɪl.ə.t̬i/
im · prob · a · bil · i · ty
Adverb:improbably
•
Plural:improbabilities
•
Adjective:improbable
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improbability Lexical Profile

improbability Game Scores & Validity

• noun

1

The quality or condition of being unlikely to happen or be true.

Example

"The sheer improbability of winning the grand prize did not deter thousands of hopeful participants from buying tickets."

2

An unlikely event, circumstance, or statement.

Example

"Critics noted that the novel's plot relied on a series of glaring improbabilities and convenient coincidences."

Synonyms
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Antonyms
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• Rhymes for improbability

• Nearby Words

imprisoner
imprisonment
impro
improbability
improbable
improbably
impromptu

Word Origin & Etymology

Borrowed in the mid-16th century from Late Latin improbabilitas, formed from improbabilis ('unlikely, not worthy of approval'), which combines the privative prefix in- ('not') with probabilis ('credible, provable'), from probare ('to test, prove').

Cite this Entry

Wordmom. (2026). Definition of Improbability. In Wordmom Dictionary. Retrieved Nov 5, 2026, from https://wordmom.com/dictionary/improbability
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