HanDict is a free online English Dictionary that gives you English definitions from Google Dictionary and Wikipedia for Android (Gphone).
You can start to search from anywhere, there is no need to close your current reading window and back to home to launch other app, just quick launch Handict for the notification bar.
while you are typing, Handict will give you spelling suggestion, you can select one of them without typing the entire word.
HanDict include Google dictionary, Wikipedia. both of them are powerful free online dictionary.
you can download it from android market, just search "Handict" or scan the following QR-Code
more detail, please check this link: