I think I am experiencing a similar issue. Let me clarify what I am sure the author meant.
When a word is looked up the desired output is a definition or a translation (depending on settings), however, in many cases a Wikipedia article shows up (with no definitions/ translations)
For instance, when I want to look up definition of the word “airy”, which means «not treating something as serious; casual», I get a Wikipedia article about someone named George Biddlle Airy (see the attachment).
That diminishes the convenience of look up function. Before, I was able to translate/define any word and carry on reading. Now because of this Wikipedia article issue I have to go to thesaurus and search the word up.
So, the question is: how can I turn off Wikipedia suggestions or at least not have exclusively them but also the translation/definition along with them? 