The term 'ARBITERS, FOR SHORT' can be summarized by two crossword solutions: REFS (4 letters) and UMPS (4 letters). REFS is an abbreviation for referees, which are people who officiate sports games and make sure the rules are followed. UMPS is an abbreviation for umpires, which are people who officiate baseball games and make sure the rules are followed. Both referees and umpires are considered arbiters, or people who settle disputes between two parties.