What's the difference between notebook and wastebook?

Notebook

Definition:

(n.) A book in which notes or memorandums are written.
(n.) A book in which notes of hand are registered.

Example Sentences:

(1) Reality set in once you got home to your parents and the regular neighborhood kids, and your thoughts turned to new notebooks for the school year and whether you got prettier while you were away and whether your crushes were going to notice.
(2) Only Olly Robbins, the permanent secretary to the Department for Exiting the European Union , had a slim notebook (shut) and pen.
(3) He opened a small notebook as a demonstration of how the al-Qaida justice system had resolved 42 cases in a fortnight.
(4) He also unveiled a new ultra-thin notebook, the MacBook Air, but Apple is no longer best known for its computers.
(5) The first scratch of an HB pencil across the fresh page of a new notebook.
(6) What I like best is hearing that The Golden Notebook is on reading lists for political or history classes.
(7) As the contest meandered and the stadium went close to quiet there was a jocular moment when Pardew hopped in irritation at a United challenge and the manager dropped his ever-present notebook on the pitch.
(8) Featuring handwritten lyrics and prose drawn from his notebooks and scraps of paper he kept in ringbinders, the selection was put together with the help of journalist Jon Savage .
(9) There's a squeeze ball, with "Red Ed – the unions' squeeze" on it, some "guess who" cards (see 3.32pm and you'll get the general idea) and "Ed Miliband's detailed plan for reducing the deficit" (a blank notebook).
(10) In my handbag, there’s generally a book, a spare book, and a notebook.
(11) He had written the name "Ian" in the top left hand corner of some of the pages in his notebooks which contained that information.
(12) The disgraced former MSP has instructed his lawyers to pursue the NoW and the convicted private investigator Glenn Mulcaire for breach of privacy after details about his home address and mobile phone were found in two of Mulcaire's notebooks in a police raid four years ago.
(13) Here was a woman, "dismal, drab, embarrassing," sodden with "self-pity," who in the Golden Notebook had single-handedly set back the women's movement "a good long way".
(14) I loved her earlier writing about her life in Africa, which was relaxed and vivid, and which I recognised again when The Golden Notebook 's story took it to Africa, but when it moved to London the style became clumsier.
(15) Major works: The Grass is Singing, 1950; In Pursuit of the English,1960; The Golden Notebook, 1962; The Memoirs Of A Survivor, 1975; The Good Terrorist, 1985; Under my Skin, 1994.
(16) At King's College London, where Jarman was a student, immersive exhibition Pandemonium includes rarely seen Super-8 films and elaborate notebooks, while Tate Modern is screening his final film, Blue.
(17) I remember being so stunned by the figure I scribbled it at the top of my notebook, as a reminder to ask him about it.
(18) In my notebook, I map out the contours of his lecture in a series of headings.
(19) The market for PCs (desktops and fixed-keyboard notebooks) will be flat, at best, but Microsoft – and computer makers – have a lot staked on "convertibles" with detachable keyboards, and touchscreen laptops.
(20) He and Doris Lessing will be discussing The Golden Notebook on Wednesday January 17 at the Newsroom, 60 Farringdon Road, London EC1 at 7pm.