Poptionary is a dictionary with a special feature: the ability to show new words when you select them in the text. It does this by opening a new window or tab, which is displayed for a short amount of time.

Poptionary is useful for anyone learning a new language. It can be used offline, so it's especially useful for people who are in a country where the language they are learning is not yet the first language.

If you've ever thought, "I wish there was a dictionary that could show me new words when I select them", then you have a good reason to use Poptionary. It does just that, and it does it very well.