I have a 2013 MacbookPro running OS X 10.9.2, and up-to-date Chrome (Version 35.0.1916.114).
When using three finger tap to look up a word with dictionary in Chrome (when chosen in the trackpad settings), the definition often pops up high above the placement of the word. Other times, it doesn't work at all, and sometimes it works like it should.
I have seen other questions here dealing with it not working, but not with its placement.
Pictured below is how it often looks. The word I looked up can be seen at the bottom.