Based on Google Dictionary (by Google)
View it on Chrome Web Store.
I personalized Google Dictionary because:
- It was not good looking enough.
- I would like it to show the meaning in both my language and English.
A+ Dictionary v.s. Official Google Dictionary
BTW, I am not sure it's legal or not (to modify their extension without informing them), but I think it won't be a big deal doing so... (And I guess you know I speak Chinese now,,, lol.)