(a) The boundary or limit of a field, mountain, forest, etc.; a border between countries or regions; the shore or bank of a sea or river; mark wei [OE mearc-weg], a road that serves as a boundary……

(a) Of living beings: near the end of the normal span of life, advanced in age; also, of children: of an age late in childhood, pre-adolescent; (b) used disparagingly; (c) old man, a man well-advanced……