ETYM Old Eng. chief, chef, Old Fren. chief, French chef, from Latin caput head, possibly akin to Eng. head. Related to Captain, Chapter.
1. The head or leader of any group of people; a commander, as of an army; the head of a tribe, clan, or family.
2. The principal part; the most valuable portion.

ETYM Obs. or R.
A person who rules or guides or inspires others.
A row of dots, hyphens, or other such characters used to lead the eye across a printed page to related information. Leaders can be created by many word processors and other programs.