What does Medical JIA stand for? Hop on to get the meaning of JIA. The Medical Acronym /Abbreviation/Slang JIA means Juvenile Idiopathic Arthritis. by AcronymAndSlang.com
Staff (music) In standard Western musical notation, the staff, or stave, [1] is a set of five horizontal lines and four spaces that each represent a different musical pitchâor, in the case of a percussion staff, different percussion instruments.
Definition of staff for English Language Learners. : 1  a group of people who work for an organization or business. : 2  a group of military officers who help a commanding officer but who do not take part in active fighting. : 3  a long stick that you carry in your hand for support while walking.