header

noun ! Definition from WordNet 3.1, Princeton University. Pronunciation from Wiktionary, via Kaikki.org. More about header at Wordnik → Where our words come from →

1. 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

2. Horizontal beam used as a finishing piece over a door or window.
3. Brick that is laid sideways at the top of a wall.