'in-chief' definitions:

Definition of 'in-chief'

From: WordNet
adjective
Indicating the head of a staff; "editor-in-chief"

Definition of 'in-chief'

From: GCIDE
  • in-chief \in-chief\ postnominal adj. a suffix signifying the head of a staff; as, editor-in-chief. [combining form] [WordNet 1.5]