The meaning of SYSTEM is a regularly interacting or interdependent group of items forming a unified whole. How to use system in a sentence. Synonym Discussion of System.

In the body, a system is a set of organs or structures that have a particular job to do: the digestive system

Systems are the subjects of study of systems theory and other systems sciences. Systems have several common properties and characteristics, including structure, function (s), behavior and interconnectivity.

1. a group or combination of interrelated, interdependent, or interacting elements forming a collective entity; a methodical or coordinated assemblage of parts, facts, concepts, etc: a system of currency; …

Apr 16, 2026 · In attributive use, especially relating to computer systems, the plural is more common than the singular; one normally speaks of a systems engineer and not a system engineer.

Any time various separate things act together in some organized way, you can call the entire group of interconnected things a system. Your veins, arteries, and heart together make up your body's …

sys•tem (sis′ təm), n. an assemblage or combination of things or parts forming a complex or unitary whole: a mountain system; a railroad system. any assemblage or set of correlated members: a …

There are 31 meanings listed in OED's entry for the noun system, three of which are labelled obsolete. See ‘Meaning & use’ for definitions, usage, and quotation evidence.

Definition of system noun in Oxford Advanced American Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.

A set or arrangement of things so related or connected as to form a unity or organic whole. A solar system, school system, system of highways.