mix up

1 of 2

verb

mixed up; mixing up; mixes up

transitive verb

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

ˈmiks-ˌəp 

1

: a state or instance of confusion

a mix-up in our hotel reservations

2

: mixture

3

: conflict, fight

Synonyms of mix up

Noun

• mistake
• confusion
• foul-up

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

Verb

By June 19, the remnants of Arthur will get quickly mixed up with an advancing cold front as its remaining circulation zips eastward through Georgia and the Carolinas and into the western Atlantic, said WPLG-TV hurricane specialist Michael Lowry in an email to USA TODAY. — Doyle Rice, USA Today, 18 June 2026

Test mixes up the answer types, offering multiple-choice questions and text entry (typing). — Jill Duffy, PC Magazine, 17 June 2026

Noun

Ousmane Dembele — France/Paris Saint-Germain (+8) Finally scored his first career goal at a major tournament for France against Iraq, and also pounced upon a terrible defensive mix-up to coolly give Mbappe a tap-in. — Liam Twomey, New York Times, 24 June 2026

One 56-year-old reviewer recalled being carded while buying wine and credited the serum for the mix-up. — Alexandra Emanuelli, Southern Living, 23 June 2026

Word History

First Known Use

Noun

1841, in the meaning defined at sense 1

Rhymes for mix up

• backup
• blowup
• breakup
• buildup
• checkup
• cleanup
• holdup
• hookup
• lineup
• lockup
• makeup
• markup

Kids Definition

mix-up

noun

ˈmik-ˌsəp

: an instance of confusion