1) backbone; a sharp, pointed part on some plants and animals; the part of a book's cover, usually with the book's title on it, covering the edge where the pages are joined (spine)
2) the short, thick finger set apart from the other four; to turn over pages etc (thumb)
Synonyms
document
a written account providing proof, evidence etc
written communication
scenario
an outline of a play, opera, film etc with details of the characters, scenes etc
master plan; sequence of events
