Adding words dropdown in blogs (like wikipedia)

Hey there, I want to add a word-drop down in my blogs like Wikipedia.


When a user shower on the highlighted text A drop-down appears (like Wikipedia) containing information about that word (which will I enter). and a picture (if I added one).
And when the user clicks on that highlighted text it follows the link which I entered.

Hope you understand, if not let me know.

Thanks 😀

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