We developed a domain-specific dictionary for terms in Software Engineering called **SEdictionary**. The dictionary includes the the definitions of software-specific terms, abbreviations and synonyms, related terms, and frequent hyperlinks in Stack Overflow. The screen shot can be seen as below: [![enter image description here][1]][1] We automatically mine such information from the Stack Overflow dataset with some Natural Language Processing (NLP) methods and word embedding. The prototype website can be accessed in [https://se-dictionary.appspot.com/][2] If there are any problems with it (bug or feature request), do not hesitate to contact me by [email protected]. Enjoy the trip to explore it~ [1]: https://i.sstatic.net/1sSNJ.png [2]: https://se-dictionary.appspot.com/