Don't use the "Define" option from the pop-up menu – ASHLEY MADISON: Life Is Short. Review

If you look up a word while composing a message, you won't be able to get back to the message. You can't get back to the app at all! Your only option is to quit the app, by double tapping the home button and swiping the app out of the list. Then you can restart the app, but of course the message will be gone. This is only the most egregious example of the litany of escaped usability defects from which this app suffers. I'd recommend using the web app instead, but it has problems of its own.
Review by Modern Commuter on ASHLEY MADISON: Life Is Short..