There are two main parts of the explanatory dictionary: one is related to Czech Sign Language and the other to Czech language (alone).
In development: American Sign Language, International Signs dictionaries.
In the part related to Czech sign language you can find videos capturing the sign, grammatical information, origin, transcription of the sign, definition of meaning, example of use in a sentence and translation into Czech. Some entries can offer even more detailed information. There are 12,860 entries in total. This dictionary accepts three types of queries: selection of hand gesture and place of articulation, specification of gesture transcript or typing Czech translation.
On the other hand the explanatory dictionary of Czech language provides mainly grammatical information, definition of meaning and example of usage in sentence for each entry. In case the entry can be found in both explanatory dictionaries, the video with translation to sign language is displayed as well. This part of the explanatory dictionary contains 119,000 entries.