Definitions of source:

• noun:   a facility where something is available
• noun:   anything that provides inspiration for later work
• noun:   a document (or organization) from which information is obtained

  Example: "The reporter had two sources for the story"

• noun:   (technology) a process by which energy or a substance enters a system

  Example: "A heat source"

• noun:   a publication (or a passage from a publication) that is referred to

  Example: "He spent hours looking for the source of that quotation"

• noun:   anything (a person or animal or plant or substance) in which an infectious agent normally lives and multiplies
• noun:   someone who originates or causes or initiates something
• noun:   a person who supplies information
• noun:   the place where something begins, where it springs into being

  Example: "Pittsburgh is the source of the Ohio River"

• verb:   get (a product) from another country or business

  Example: "She sourced a supply of carpet"

• verb:   specify the origin of

  Example: "The writer carefully sourced her report"