Where are the additional references I purchased?

If you've purchased the monthly or annual ad-removal + additional references subscription in the Merriam-Webster Dictionary app, you have access to our Medical, Legal, and Kids definitions. You can find these definitions in the app by searching for a word as you would normally, using the search bar or voice search. If the word you've searched for is defined in multiple dictionaries, you will see the option to switch between them displayed at the top of the screen: 

If the word is defined in only one dictionary, the dictionary that the definition comes from will be indicated within the entry itself.