/ˈhɛdıŋ/ noun, pl -ings [count]
1 : the direction in which a ship or aircraft points
What is your current heading?
2 : a word, phrase, etc., that is placed at the beginning of a document, passage, etc., or at the top of a page
We organized all the recipes under different subject headings.
a chapter heading
3 : a name or label used for a group of people or things
His paintings usually fall/go/come under the heading of realism.
Useful english dictionary. 2012.