Step 1: Select the tab you would like to define.
Step 2:Double tap on the word.
Step 3:A menu will pop up and you can tap Define to view the definition, pronunciation, and more.
Other text editing features
While the above features should be present throughout all of iOS, some apps choose to implement other text edit features.
If you are reading a book in iBooks you will also have the option to highlight text as well.
When composing an e-mail you’ll have the option to increase or decrease the quotation level, or apply other Rich Text formatting like Bold, Italic, or Underline.