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.
Do what would be impossible in reality – explore 3D structures, perform simulated surgeries, or conduct physics experiments in zero gravity. Ray Ravaglia, Forbes, 26 Feb. 2025 The exact number of people going south is impossible to count, but anecdotally there is no question the numbers are in the thousands and quickly rising. Matt Rivers, ABC News, 26 Feb. 2025 That has proven – particularly in this era of entire rosters being one-and-done with NIL and the transfer portal – to be nearly impossible. Joe Arruda, Hartford Courant, 26 Feb. 2025 The administration argued that meeting the judge's deadline by Wednesday would be logistically impossible due to the complexities of verifying contracts under new oversight procedures. Hannah Parry, Newsweek, 26 Feb. 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 13 Mar. 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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