As others have said, check out the glossary on the church website (https://www.episcopalchurch.org/glossary/). Also, I should add that you can get it in a paperback form (Amazon: https://www.amazon.com/Episcopal-Dictionary-Church-User-Friendly-Episcopalians/dp/0898692113; Church Publishing: https://www.churchpublishing.org/products/anepiscopaldictionaryofthechurch) if that is more convenient for you and/or you like having a printed copy on hand!