impossible

adjective

im·​pos·​si·​ble (ˌ)im-ˈpä-sə-bəl How to pronounce impossible (audio)
1
a
: incapable of being or of occurring
b
: felt to be incapable of being done, attained, or fulfilled : insuperably difficult
an impossible deadline
2
a
: extremely undesirable : unacceptable
b
: extremely awkward or difficult to deal with
the actor was impossible on the set
impossibleness noun

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
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
As is often the problem with biopics of all kinds — jukebox musical or not — the sheer scope of a life is impossible to capture in a mere 2 hour runtime. Shania Russell, EW.com, 27 Apr. 2025 And after dark, the dealers were impossible to miss: short young men in hoodies and women in pajama pants, slinking around corners with side packs. Jason Motlagh, Rolling Stone, 27 Apr. 2025 That’s not impossible: eSIM only phones are currently exclusive to the U.S., so the dummies for the two Pro models seem to indicate that eSIM isn’t going to make it around the world this year. David Phelan, Forbes.com, 26 Apr. 2025 Two Venezuelan friends separated by 25 miles will spend their weekend at Kauffman Stadium doing what at one point may have seemed impossible. Jaylon Thompson, Kansas City Star, 26 Apr. 2025 See All Example Sentences for impossible

Word History

Etymology

Middle English, from Anglo-French & Latin; Anglo-French, from Latin impossibilis, from in- + possibilis possible

First Known Use

14th century, in the meaning defined at sense 1a

Time Traveler
The first known use of impossible was in the 14th century

Browse Nearby Words

Cite this Entry

“Impossible.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/impossible. Accessed 30 Apr. 2025.

Kids Definition

impossible

adjective
im·​pos·​si·​ble (ˈ)im-ˈpäs-ə-bəl How to pronounce impossible (audio)
1
a
: incapable of being or of occurring
b
: very difficult : hopeless
an impossible situation
2
: very bad or unpleasant
an impossible person
impossibly
-blē
adverb

Legal Definition

impossible

adjective
im·​pos·​si·​ble
: not possible : incapable of being done, attained, or fulfilled
a party's performance is impossible in part

More from Merriam-Webster on impossible

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