heading in WordNet English dictionary

1. the direction or path along which something moves or along which it lies
   bearing  heading  aim 
   
2. a horizontal (or nearly horizontal) passageway in a mine
   "they dug a drift parallel with the vein"
   drift  heading  gallery 
   
3. a line of text serving to indicate what the passage below it is about
   "the heading seemed to have little to do with the text"
   heading  header  head