Just upgraded to iOS7, and the facility to get a definition of a word in iBooks text has stopped working: ever word - even simple ones - shows "No definition found". Is there a work-around that anyone knows, please? Peter
Hi, Peter! Welcome to iPF!
First, try the usual fixes: reset, restart your iPad and force close all apps.
Reset: press and hold Home and Power button until the Apple logo appears.
Restart: turn off your iPad, wait for a few minutes, then turn it on again.
Force close: double tap Home button or four/five finger swipe to reveal the multitask bar, then tap one of the tumbnails above app icons and drag it upwards towards the top of the screen.
Another possibility: open Safari on your iPad, choose any website, select a word there and from what appears, choose "Define". The next popup will almost certainly say "No Definition Found", and at the bottom of it, you'll find "Manage". Tap it, and you're able then to download a dictionary listed there. Choose the one/s you need and try again after downloading the dictionary.
If these won't fix your problem, you will have to backup your iPad and restore it:
http://support.apple.com/kb/HT1766