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pop-up

adjective
 
 
/ˈpɒp.ʌp/ US  /ˈpɑːp-/

Definition

used to describe a machine, book, etc. that has parts that push out from a surface or from inside: a pop-up children's book a pop-up toaster used to describe a shop, restaurant, etc. that operates temporarily and only for a short period when it is likely to get a lot of customers
(Definition of pop-up adjective from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)

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