impossible
adjective
im·pos·si·ble
(ˌ)im-ˈpä-sə-bəl 
1
a
: incapable of being or of occurring
It's impossible to tell the future.
b
: felt to be incapable of being done, attained, or fulfilled : insuperably difficult
an impossible deadline
2
a
: extremely undesirable : unacceptable
in an impossible situation
b
: extremely awkward or difficult to deal with
The actor was impossible on the set.
impossibleness
noun
Synonyms of impossible
Examples of impossible in a Sentence
It's impossible to predict the future.
The heavy rain made it impossible to see the road.
It's physically impossible for a child to lift that much at once.
It's virtually impossible to book a flight just before the holiday.
These math problems are impossible!
You refuse to help and then criticize me for not doing it right? You're impossible!
My boss is just an impossible woman.
Recent Examples on the Web
Snake Plant Valued for being nearly impossible to kill, snake plants are one of the most common houseplants around.
—
Lauren Jarvis-Gibson, Miami Herald, 24 Mar. 2026
While high prices at the grocery store might entice would-be farmers to start herds, rising input costs and farmland decimated by drought have made entering the profession nearly impossible.
—Anthony Pahnke, Boston Herald, 23 Mar. 2026
That's not to say a long period with a weak stock market is impossible.
—Stephan Bisaha, NPR, 23 Mar. 2026
That stunted dynamic all puts the dramatic onus of the season on Jolyon’s and Louisa’s relationship, made impossible both by class and by Francis’s political machinations for her husband.
—Sarah Shachat, IndieWire, 23 Mar. 2026
See All Example Sentences for impossible
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show current usage.
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Lauren Jarvis-Gibson, Miami Herald, 24 Mar. 2026
While high prices at the grocery store might entice would-be farmers to start herds, rising input costs and farmland decimated by drought have made entering the profession nearly impossible.
—Anthony Pahnke, Boston Herald, 23 Mar. 2026
That's not to say a long period with a weak stock market is impossible.
—Stephan Bisaha, NPR, 23 Mar. 2026
That stunted dynamic all puts the dramatic onus of the season on Jolyon’s and Louisa’s relationship, made impossible both by class and by Francis’s political machinations for her husband.
—Sarah Shachat, IndieWire, 23 Mar. 2026
See All Example Sentences for impossible
Cite this Entry
“Impossible.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/impossible. Accessed 27 Mar. 2026.
Copy CitationKids Definition
impossible
adjective
im·pos·si·ble
(ˈ)im-ˈpäs-ə-bəl
1
a
: incapable of being or of occurring
b
: very difficult : hopeless
an impossible situation
2
: very bad or unpleasant
an impossible person
impossibly
adverb
-blē
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