With the big "G" all the available categories are showing up, regardless the search term I'm searching for. As they should. With DDG, some weird algorithm selects which ones from categories Web, Images, Videos, News, Meanings, Definition will show up at all: which doesn't make much sense, does it? Because, philosophical question: Who is supposed to be smarter: the search engine, or the person searching?
By the way aren't separate categories for Meanings and Definition an overkill? This confuses most normal people, maybe expect for your in-house developers. ;)