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  • pop-up
    pop-up
    adjective
    (of books, usually children's books) having pieces of artwork fastened to the pages so that when the page is opened, a three-dimensional cutout or object is formed and, sometimes, movement of a picture element, such as a door opening, can be activated by pulling a tab.
  • pop up
    pop up
    Suddenly appear, as in After a brief warm spell all the flowers popped up, or He's constantly popping up where he's least expected.
Synonyms

pop-up

American  
[pop-uhp] / ˈpɒpˌʌp /
Or popup

adjective

  1. (of books, usually children's books) having pieces of artwork fastened to the pages so that when the page is opened, a three-dimensional cutout or object is formed and, sometimes, movement of a picture element, such as a door opening, can be activated by pulling a tab.

  2. of or being a device that ejects or raises a finished or used item from the top.

    a pop-up toaster.

  3. of or relating to a device, mechanism, or object that rises or pivots from a concealed or recessed position to its operating position.

    a camera with a pop-up electronic flash; a car with pop-up headlights.

  4. popping up, as from an appliance or object.

    pop-up waffles heated in the toaster; a pop-up gauge for indicating when the turkey is done.

  5. noting or pertaining to a store, restaurant, etc., that temporarily takes over a vacant space and does business there for a short time.

    a pop-up store selling Halloween costumes.

  6. Digital Technology. (of a new window or its content) appearing suddenly and temporarily within or in front of an open window on the screen of a computer or mobile device.

    Right-click to get a pop-up menu. There are tools to block pop-up ads.


noun

pop-ups plural
  1. a pop-up book.

  2. Also called pop-out.  Also called popout.  something, as a partially cut out or spring-mounted illustration in a children's book, that unfolds or springs up when opened or otherwise activated.

    a Christmas card with a pop-up of Santa Claus.

  3. Baseball. pop fly.

  4. a pop-up store, restaurant, etc.

  5. Digital Technology. a pop-up window, message, advertisement, etc..

    Press the hotkey and the pop-up will appear.

pop-up British  

adjective

  1. (of an appliance) characterized by or having a mechanism that pops up

    a pop-up toaster

  2. (of a book) having pages that rise when opened to simulate a three-dimensional form

  3. computing (of a menu on a computer screen, etc) suddenly appearing when an option is selected

  4. (of a shop, restaurant, venue, or other small business) intentionally opening and closing for business within a very short span of time

    a pop-up shop

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

verb

  1. (intr, adverb) to appear suddenly from below

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

noun

  1. computing something that appears over or above the open window on a computer screen

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
pop up Idioms  
  1. Suddenly appear, as in After a brief warm spell all the flowers popped up, or He's constantly popping up where he's least expected.


Other Word Forms

Noun Inflected Forms

Etymology

Origin of pop-up

First recorded in 1860–65 pop-up for def. 9; noun, adjective use of verb phrase pop up

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

New York has designated hundreds of public buildings as cooling centers, extended public swimming pool hours, dispatched volunteers to check on vulnerable residents, and opened "pop up" cooling stations with misting fans and wet towels.

From Barron's • Jul. 1, 2026

Smoove will pop up at some point to rehash Leon and Larry’s dynamic in, shall we say, an ancestral context.

From Salon • Jun. 26, 2026

Flash frames, scratches and specks of dust pop up randomly on the screen.

From Los Angeles Times • Jun. 19, 2026

He’s still on his boat, looking for contract work in a job market where competition is stiff when new jobs pop up.

From The Wall Street Journal • Jun. 14, 2026

Even when we think we know what is likely to happen, surprises tend to pop up willy-nilly—what?

From "The Unseen Guest" by Maryrose Wood

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