mix up

1 of 2

verb

mixed up; mixing up; mixes up
1
: to mistakenly think that (someone or something) is someone or something else : confuse
mixed the twins up
mixed up the times for the meetings
2
: to mistakenly put (something) in a place where something else should be
mixed up the two files
3
: to cause (someone) to be involved in a usually dangerous or improper activity
usually used as (be/get) mixed up in
got mixed up in an illegal scheme
4
: to cause (someone) to become involved with usually bad or dangerous people

mix-up

2 of 2

noun

1
: a state or instance of confusion
a mix-up in our hotel reservations
2
3

Examples of mix up in a Sentence

Noun there was a mix-up at the airport and our luggage was accidentally sent to Ohio
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.
Noun
The mix-ups led to the wrong body being cremated and the wrong person being buried, and the mistakes were only discovered after both occurred, according to the outlets. Kimberlee Speakman, PEOPLE, 27 Dec. 2025 Despite the car photo mix-up last year and the lack of movement on the case this year, Safforld's family still has hope that justice may come for their mother. Carol Thompson, CBS News, 21 Dec. 2025 Ultimately, that mix-up is apt foreshadowing. Tom Smyth, Vulture, 9 Dec. 2025 This novel is much more than a story of a possible hospital mix-up of babies. Mary Ann Grossmann, Twin Cities, 30 Nov. 2025 See All Example Sentences for mix up

Word History

First Known Use

Noun

1841, in the meaning defined at sense 1

Time Traveler
The first known use of mix up was in 1841

Browse Nearby Words

Cite this Entry

“Mix up.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/mix%20up. Accessed 1 Jan. 2026.

Kids Definition

mix-up

noun
ˈmik-ˌsəp
: an instance of confusion

More from Merriam-Webster on mix up

Last Updated: - Definition revised
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