"Presbyterian" describes a form of church government where decisions are made by elected representatives. Those representatives are called "elders," but they aren't necessarily old! Elders can be any age, and leadership positions are open to women as well as to men.
Our elders serve three-year terms on the ruling body, which is called the Session. The Session meets once a month to do church business, and our ruling elders help with pastoral responsibilities as well.
Churches within a particular geographical area are organized into Presbyteries. All ministers plus elected elder representatives from each congregation meet twice a year to do Presbytery business, which includes work on shared ministries and mission efforts, oversight of pastors and candidates for ministry, and assistance for churches who are in need.