- a book of notes: They checked the sergeant's notebook for clues to his whereabouts.
- a book or binder of blank, often ruled, pages on which to write, especially one used by students to take notes in class.
- a book in which promissory notes are entered, registered, recorded, etc.
- a small, lightweight laptop computer.
- a book for recording notes or memoranda
- a book for registering promissory notes
