Definitions of Northern:

• noun:   a dialect of Middle English that developed into Scottish Lallans
• adjective:   situated in or coming from regions of the north

  Example: "The northern hemisphere"

• adjective:   in or characteristic of a region of the United States north of (approximately) the Mason-Dixon line

  Example: "Northern liberals"

• adjective:   coming from the north; used especially of wind

  Example: "A northern snowstorm"

• adjective:   situated in or oriented toward the north

  Example: "The northern suburbs"

• name:  A surname (rare: 1 in 50000 families; popularity rank in the U.S.: #6207)