head·ing / ˈheding/ • n. 1. a title at the head of a page or section of a book: chapter headings. ∎ a division or section of a subject; a class or category: this topic falls under four main headings.2. a direction or bearing: he crawled on a heading of 90 degrees until he came to the track.3. a horizontal passage made in preparation for building a tunnel. ∎ Mining another term for drift (sense 4).4. a strip of cloth at the top of a curtain above the hooks or wire that suspend the curtain.