“I like the way on the iPad the dictionaries are available from different apps but I also use the free Dictionary.com and Thesaurus app as it works offline and gives me the pronunciation of words.” Andreas
There are advertisements supporting the free version of the app. These disappear if you pay £2.99 for the ad free version of the Dictionary. The iPad version also appears to work on an iPhone OS 6 as can be seen in the image and you can say the word using speech recognition.
“I like the iPhone’s dictionary – if you don’t know the meaning of a word on a website you just have to tap on it to get its meaning. So simple and easy.” Anibul
The dictionary was added for iOS 5 and it is important to just tap and hold on a single word to see the ‘Define‘ menu appear beside ‘Copy, Select All and Speak’. It does not work in all applications. In messages the complete message is highlighted on tap and hold but you can use Copy and use Speak.