LaunchBar/Quicksilver as a replacement of Spotlight? I asked about the usefulness of spotlight here, as I don't like the drag that spotlight causes all the time.

What I found useful in Spotlight is those two.


word lookup : spotlight opens 'Dictionary' App automatically when it can look the word up.
search for PDF 


And one of the answer that I got is from 'Dan Ray' saying "Personally, I disable it in favor of Quicksilver.".

I don't use Quicksilver, but LaunchBar, but it seems to me that LaunchBar doesn't look up the pdf. And, furthermore, it has an option to search in Spotlight.

and My questions are 


Can LaunchBar can do the two things? Look into Dictionary, and pdf search?
Can QuickSilver can do the two things?


If one of the tools can do that, I guess I just disable Spotlight, and enjoy the speedup.
QuickSliver has Spotlight plugin and Dictionary (which can fetch definition from dict.org plugin.

The spotlight plugin allows you to search for a string in either Finder, Window or a command window.