Here’s a page that contains a glossary (=list of terms in a special area of study) of musical terms.
For example, if you want to know what a canon is, you can learn here!
There seems to be a few words missing, such as reprise. So if you see the word reprise on a piece of music, you can check another glossary to find that it means “To repeat a previous part of a composition generally after other music has been played.”
Of course, it always helps to simply check a dictionary app on your phone if you have one, too!