NOUN (3)

1. a notebook containing descriptions and diagrams of the plays that a team has practiced (especially an American football team);

2. a book containing the scripts of one or more dramatic plays;
- Example: "the 1963 playbook leaves out the whole first scene"

3. a scheme or set of strategies for conducting a business campaign or a political campaign;
- Example: "they borrowed a page from the playbook of the opposition"

The Collaborative International Dictionary of English v.0.48:

Playbook \Play"book`\, n.
   A book of dramatic compositions; a book of the play. --Swift.
   [1913 Webster]

WordNet (r) 3.0 (2006):

playbook
    n 1: a notebook containing descriptions and diagrams of the
         plays that a team has practiced (especially an American
         football team)
    2: a book containing the scripts of one or more dramatic plays;
       "the 1963 playbook leaves out the whole first scene"
    3: a scheme or set of strategies for conducting a business
       campaign or a political campaign; "they borrowed a page from
       the playbook of the opposition"

Moby Thesaurus II by Grady Ward, 1.0:

50 Moby Thesaurus words for "playbook":
   best seller, book, bound book, classic, coloring book, continuity,
   cue, definitive work, folio, great work, hardback, juvenile,
   juvenile book, libretto, limp-cover book, lines, magnum opus,
   nonbook, notebook, novel, opus, opuscule, opusculum, paperback,
   picture book, pocket book, prayer book, production, psalmbook,
   psalter, publication, scenario, scene plot, score, script, serial,
   shooting script, side, sketchbook, soft-cover, songbook,
   standard work, storybook, text, title, tome, trade book, volume,
   work, writing