What happened to the dictionary define menu in iOS 10?
Looking for the Define option in the pop up menu after highlighting text? iOS 10 features a replacement for the dictionary definition option. Instead of Define, tap Look Up.
Look Up does include word definitions, however this is just the tip of the iceberg. Content sources searched by Spotlight and Siri are also provided, including the App Store, iTunes, nearby locations, current news, movie information and more. Results are interactive, and returning to the original activity is simplified by tapping Done or following the breadcrumbs in the top left.