What is the meaning of playbook?

noun

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