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Definition of impossible

impossible

/ɪmˈpɑː.sə.bəl/
im · pos · si · ble
Adverb:impossibly
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impossible Lexical Profile

impossible Game Scores & Validity

• adjective

1

Not able to occur, exist, or be done.

Example

"Without the proper encryption key, accessing the secure database is mathematically impossible."

2

Very difficult to deal with, tolerate, or resolve.

Example

"The sudden schedule change put the event organizers in an impossible situation."

Synonyms
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Antonyms
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• noun

1

Something that cannot occur, exist, or be accomplished (usually preceded by 'the').

Example

"The rescue team accomplished the impossible by reaching the stranded climbers before nightfall."

Synonyms
View all synonyms for impossible
Antonyms
View all antonyms for impossible

• Rhymes for impossible

• Nearby Words

imposingly
imposition
impossibility
impossible
impossibly
impostor
impotence

Word Origin & Etymology

Borrowed in the 14th century from Old French impossible, from Latin impossibilis, formed from the negative prefix in- ('not') and possibilis ('possible'), from posse ('to be able').

Cite this Entry

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