I have been using WordWeb Pro for years now, which pops up when you hover over a word and ctrl + right click. One of the many references available for purchase

I have been using WordWeb Pro for years now, which pops up when you hover over a word and ctrl + right click. One of the many references available for purchase is the shorter Oxford English Dictionary. Others include their own dictionary with audio pronunciation, Chambers Dictionary and Thesaurus, New Oxford American Dictionary, and Collins English Dictionary. I have purchased all except Collins which I have in print. Since I work in patent prosecution and litigation, I use WordWeb many times per day. I also have print additions of many older dictionaries and other resources to ascertain the meaning of a word at the time the invention. It's amazing to look at multiple definitions and realize that each resource can have slightly or very different meanings.