APA Dictionary of Psychology

system

Updated on 04/19/2018

any collective entity consisting of a set of interrelated or interacting elements that have been organized together to perform a function.
an orderly method of classification or procedure (e.g., the Library of Congress Classification system).
a structured set of facts, concepts, and hypotheses that provide a framework of thought or belief, as in a philosophical system. See conceptual system.
a living organism or one of its major bodily structures (e.g., the respiratory system). —systematic adj.

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