(from Google Dictionary)
1. a set of things working together as parts of a mechanism or an interconnecting network. e.g. railroad system
synonyms: structure, organization, order, arrangement, complex, apparatus, network

  1. a set of principles or procedures according to which something is done; an organized scheme or method. e.g. a multiparty system of government synonyms: method, methodology, technique, process, procedure, approach, practice, means, way, manner, mode, framework

(from J. Christopher Jones)
1. interconnected elements with a purpose

Systems definitions(?)

What is a system?

Elizabeth Leeper