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Definition of improbable

improbable

/ɪmˈprɑːbəbəl/
im · prob · a · ble
Adverb:improbably
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improbable Lexical Profile

improbable Game Scores & Validity

• adjective

1

Not likely to be true or to happen; having a very low probability of occurring.

Example

"The defense attorney argued that the prosecution's version of events was highly improbable."

2

Unexpected and seemingly contrary to what one would normally expect in a given situation.

Example

"The quiet librarian became an improbable local hero after rescuing the family from the flood."

Synonyms
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Antonyms
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• Rhymes for improbable

• Nearby Words

imprisonment
impro
improbability
improbable
improbably
impromptu
improper

Word Origin & Etymology

Borrowed in the mid-16th century from Latin improbabilis, meaning 'not worthy of approval' or 'difficult to prove', formed from the negative prefix in- ('not') and probabilis ('provable' or 'credible').

Cite this Entry

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