Question: Love this site, just joined because I finally figured out exactly how I want Ubuntu to behave and I haven't been able to find a way to do this. I know there are things like the classic menu indicator, and I have mostly used cairo-dock because I like it's main menu, instead of Unity's dash, which I still can't stand. I've messed around with all kinds of Ubuntu flavors and I really think in the end Ubunutu would be perfect with Unity, but with the dash system replaced.

Answer: 
For others looking at this question, you may want to consider my new project:
<https://github.com/mufeed20/pydict>  

It may just be what you are looking for but its in alpha. If possible, consider contributing.  

Run 'pydict.py' in SFPD. This does not need you to install additional applications other than Python 3, dictd, dict-wn and python-gobject.
You can't find in among the applications, because `dictd` in itself is a console application, you have to use a frontend application for it, e.g. `opendict` or `goldendict`.

In console, you would simple just write `dict [options] word`. You can look up the options at the `man` page of `dict`.

What I *did not* cover in this answer is the installation of a dictionary to the `dictd` database. As I have not used the software personally, I cannot provide a solution for this, but you may surely find guides for it on the internet.