misassumption

noun

mis·as·sump·tion ˌmis-ə-ˈsəm(p)-shən

plural misassumptions

: something that is incorrectly assumed to be granted or true : a mistaken assumption

I shudder to think of how much margarine I ate growing up on the misassumption that it was somehow healthier.—

Richard T. Bosshardt

misassume

ˌmis-ə-ˈsüm

transitive verb

misassumed; misassuming

… a lot of boys get shunted into programs that misassume what they can and can't do … —

Richard Whitmire

First Known Use

1860, in the meaning defined above

Time Traveler

The first known use of misassumption was in 1860

See more words from the same year

misassignment

misassumption

misattribute

See all Nearby Words

Style

“Misassumption.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/misassumption. Accessed 4 Nov. 2025.

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