chief
1. chief \'che-f\ n [ME, fr. OF, head, chief, fr. L caput head - more at HEAD] 1: the upper part of an heraldic field 2: the head of a body or organization : LEADER 3: the principal or most valuable part 2. chief aj 1: accorded highest rank or office 2: of greatest importance, significance, or influence - chief.ly avor ;aj 3. chief av archaic : CHIEFLY