In order to use the dictionary lookup function, you first need to install one or more dictionaries in the [StarDict](https://en.wikipedia.org/wiki/StarDict) format. A list of freely available dictionaries can be found on the [Firedict site](https://tuxor1337.github.io/firedict/dictionaries.html). ([Firedict](https://tuxor1337.github.io/firedict/) "is a simple offline dictionary software for Firefox OS with support for the StarDict format.")
In order to use the dictionary lookup function, you first need to install one or more dictionaries in the [StarDict](https://en.wikipedia.org/wiki/StarDict) format. A list of freely available dictionaries can be found on the [Firedict site](https://tuxor1337.frama.io/firedict/dictionaries.html). ([Firedict](https://tuxor1337.github.io/firedict/) "is a simple offline dictionary software for Firefox OS with support for the StarDict format.")
The dictionaries need to be installed into one of those directories:
* `/sdcard/koreader/data/dict` directory for Android