(transitive) To remove material, especially images, from a publication.
1895, William Roberts, The book-hunter in London: historical and other studies of collectors and collecting. With numerous portraits and illustrations:
In fifty cases out of a hundred, booksellers who make grangerizing a speciality find it pays far better to break up an illustrated book than to sell it intact.
1986, American book collector, volume 7:
In more recent years many finely illustrated books (such as Audubon's The Birds of America and Bartolozzi's fine engravings of Holbein's portraits), together with books of many modern artists, have been grangerized for their individual prints.