Whenever I see a word in the forums that I don't know the meaning of, I double-click the word (or words) to select it/them, then right-click and select "Web search for [word]". I use Mozilla; other browsers might say something different but similar.
My default search engine opens in a new window, with the results of the search. Quick and easy
btw, this works on any Web page, not just on the DC forums.
Hope this is helpful.