MDBG has been around for a while, it is almost the staple online dictionary for Chinese language students. I started using it back when I first started taking Chinese in college, and have been using it ever since. Whether I am working on a translation, need a quick lookup, or just want to double check the Simplified/Traditional variant of a specific character, I find MDBG to be my go-to online dictionary.
It has these other great features:
- handwriting recognition for writing characters if you don’t know the Pinyin to type it in;
- looking up by radicals;
- Chinese and Pinyin typing interfaces
Check it out here.