Definitions of branch:

• noun:   an administrative division of some larger or more complex organization

  Example: "A branch of Congress"

• noun:   a stream or river connected to a larger one
• noun:   a division of a stem, or secondary stem arising from the main stem of a plant
• noun:   a part of a forked or branching shape

  Example: "He broke off one of the branches"

• noun:   any projection that is thought to resemble an arm

  Example: "A branch of the sewer"

• noun:   a natural consequence of development
• verb:   divide into two or more branches so as to form a fork
• verb:   grow and send out branches or branch-like structures
• name:  A surname (common: 1 in 6250 families; popularity rank in the U.S.: #718)