[chief] adj (14c) 1: accorded highest rank or office "~ librarian"
2: of greatest importance or influence "the ~ reasons"
[2]chief adv (14c) archaic: chiefly [3]chief n [ME, fr. MF, head, chief, fr. L caput head--more at head] (15c) 1: the upper part of a heraldic field
2: the head of a body of persons or an organization: leader "~ of police"
3: the principal or most valuable part -- chief.dom n -- chief.ship n -- in chief : in the chief position or place--often used in titles "commander in chief"