pop-up (n., adj.), pop up (v.): Note hyphen when used as a noun or adjective. Not popup. Two words when used as a verb. (Example: Get rid of pop-ups before they pop up.

How do you write pop up?

Turns out the use of a hyphen is a far more complex issue than I ever imagined. I've read that the word pop-up, historically a retail marketing term, can appear with a hyphen, without a hyphen and occasionally without a space between 'pop' and 'up'.

Is it pop up or popped up?

There are different uses of it on the internet, such as “popup,” “pop-up,” and “pop up.” Pop up is a verb that defines the action of popping up. Pop-up is both a noun and an adjective, whereas “popup” without the hyphen is incorrect.