It may be handy when reading to get an specific word definition from a dictionary.
Octavo, has a built-in language-unified dictionary from different sources to show you what you need without having to leave your read.
Tap on any word of a text block to open the side panel with the definition of your word.
On the top right menu, select the dictionary option and search the word you want to find on the language of your read.
See it in action