Barnes & Noble nook User Manual page 130

To look up any word:
1 Tap Look up word.
2 Tap Keyboard.
3 Enter the word you want to look up and tap Search. The definition is displayed in a dialog panel
overlaying the reading content. A definition can be more than one page in length. Move between
pages using the Next Page and Previous Page buttons.
4 Tap OK when you have finished reading the definition to return to your reading. You are still in
word lookup mode, and can look up another word.
5 Tap Cancel to exit word lookup mode.
NOOK User Guide Reading 130