D defs.my
Entry 6 senses Webster, 1913

Heading

· Head·ing · IPA /ˈhɛdɪŋ/
01 n. The act or state of one who, or that which, heads; formation of a head.
  1. 1.
    The act or state of one who, or that which, heads; formation of a head.
  2. 2.
    That which stands at the head; title; as, the heading of a paper.
  3. 3.
    Material for the heads of casks, barrels, etc.
  4. 4.
    A gallery, drift, or adit in a mine; the vein above a drift.(Mining, tunneling)
  5. 5.
    The extension of a line ruffling above the line of stitch.(Sewing)
  6. 6.
    That end of a stone or brick which is presented outward.(Masonry)
Phrases & compounds
Heading course — a course consisting only of headers. See Header, n. 3 (a).
Heading joint — A joint, as of two or more boards, etc., at right angles to the grain of the wood.