Last week Google added a search box to the dictionary search results answer at the top of the page. The user interface for dictionary results seem similar to the one that launched in 2013 with the core exception of Google added a box in the dictionary answer for you to type another phrase you want defined.
Here is the new dictionary result, notice the search box:
Another neat thing is if you search for [dictionary], Google will show you the past terms you searched for that brought up the Google Dictionary:
You can use the carousel to go through the past number of search terms that brought up that dictionary.
Here is what it looked like 4 years ago:
Forum discussion at Twitter.