Definitions of heading:

• noun:   a line of text serving to indicate what the passage below it is about

  Example: "The heading seemed to have little to do with the text"

• noun:   a horizontal (or nearly horizontal) passageway in a mine
• noun:   the direction or path along which something moves or along which it lies
• name:  A surname (very rare: popularity rank in the U.S.: #83963)