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pop up

verb
  1. To come up with a "pop" sound. (intransitive) · The toast is in the toaster - when it pops up it will be ready.
  2. To appear without warning. (informal, intransitive) · I can't remember where I left my keys, but they normally pop up somewhere.
  3. (Of an alert, advertisement, etc.) To suddenly appear onscreen. (intransitive) · And then up popped on my screen something truly bizarre.
  4. To display as an alert, advertisement, etc. that suddenly appears on screen. (transitive) · My computer just popped up a warning about Internet security.
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Words, meanings, pronunciations and translations from Wiktionary (CC BY-SA 4.0); how common each word is from wordfreq. Made into this dictionary by FluentPlex.