Google dictionary https://chrome.google.com/webstore/detail/google-dictionary-by-goog/mgijmajocgfcbeboacabfgobmjgjcoja https://chrome.google.com/webstore/detail

Google dictionary https://chrome.google.com/webstore/detail/google-dictionary-by-goog/mgijmajocgfcbeboacabfgobmjgjcoja https://chrome.google.com/webstore/detail/google-dictionary-... Double click on words and you get the definition, or translation if it's in another language. Works for non-dictionary words as well, normally giving the Wikipedia definition.