Definitions of Foster:

• noun:   United States songwriter whose songs embody the sentiment of the South before the American Civil War (1826-1864)
• verb:   bring up under fosterage; of children
• verb:   promote the growth of

  Example: "Foster our children's well-being and education"

• verb:   help develop, help grow
• adjective:   providing or receiving nurture or parental care though not related by blood or legal ties

  Example: "Foster parent"

• name:  A surname (very common: 1 in 1098 families; popularity rank in the U.S.: #93)
• name:  A male given name (rare: 1 in 16666 males; popularity rank in the U.S.: #923)