adj · noun · 9 senses · updated from the 2026-07-25 local source snapshot
Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.
Sound
Pronunciation
Each Play button uses your device's default local English voice, or a natural local fallback. The selected voice name appears after playback. This is synthesized speech, not a source recording.
UK:/ɪmˈpɒs.ɪ.bəl/
UK:[ɪmˈpɒs.ɪ.bl̩]
UK:/ɪmˈpɒs.ə.bəl/
UK:[ɪmˈpɒs.ə.bl̩]
Canada, US:/ɪmˈpɑ.sə.bəl/
Canada, US:[ɪmˈpɑ.sə.bl̩]
US:Recorded audio is listed in the source snapshot.
Australian:/ɪmˈpɔs.ɪ.bəl/
Australian:[ɪmˈpɔs.ɪ.bl̩]
CMU ARPABET:IH2 M P AA1 S AH0 B AH0 L
Digits mark lexical stress: 1 primary, 2 secondary, 0 unstressed.
1
adj
Meaning 1
Not possible; not able to be done or happen.
Definition source: English Wiktionary via Wiktextract
Usage: not-comparable, usually
Examples
13 March 1962, John F. Kennedy, speech at the White House Those who make peaceful revolution impossible will make violent revolution inevitable.
It is difficult, if not impossible, to memorize 20,000 consecutive numbers.
Sarah thinks that nothing is impossible because things can always somehow happen.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
2
adj
Meaning 2
Very difficult to deal with.
Definition source: English Wiktionary via Wiktextract
Usage: colloquial, not-comparable, usually
Examples
You never listen to a word I say – you're impossible!
This humidity is impossible.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
3
adj
Meaning 3
imaginary
Definition source: English Wiktionary via Wiktextract
Usage: dated, not-comparable, usually
Topics: mathematics, sciences
Examples
impossible quantities, or imaginary numbers
Meaning relationships
Synonyms: none provided
Antonyms: none provided
4
noun
Meaning 4
An impossibility.
Definition source: English Wiktionary via Wiktextract
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
5
noun
Meaning 5
A skateboard trick consisting of a backflip performed in midair.
Definition source: English Wiktionary via Wiktextract
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
6
adjective
Meaning 6
not capable of occurring or being accomplished or dealt with
Definition source: Princeton WordNet 3.0
Examples
an impossible dream
an impossible situation
Meaning relationships
Synonyms: none provided
Antonyms: possible
7
adjective satellite
Meaning 7
totally unlikely
Definition source: Princeton WordNet 3.0
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: inconceivable, out of the question, unimaginable