1.  system(n = noun.artifact) - instrumentality that combines interrelated interacting artifacts designed to work as a coherent entity; "he bought a new stereo system"; "the system consists of a motor and a small computer"

2.  system(n = noun.group) scheme - a group of independent but interrelated elements comprising a unified whole; "a vast system of production and distribution and consumption keep the country going"

3.  system(n = noun.substance) - (physical chemistry) a sample of matter in which substances in different phases are in equilibrium; "a system generating hydrogen peroxide"; "in a static system oil cannot be replaced by water on a surface"

4.  system(n = noun.cognition) system of rules - a complex of methods or rules governing behavior; "that language has a complex system for indicating gender"; "they have to operate under a system they oppose"

5.  system(n = noun.cognition) arrangement, organisation, organization - an organized structure for arranging or classifying; "he changed the arrangement of the topics"; "he tried to understand their system of classification"; "the facts were familiar but it was in the organization of them that he was original"
Derived form verb systemise₁, verb systemize₁

6.  system(n = noun.body) - a group of physiologically or anatomically related organs or parts; "the body has a system of organs for digestion"

7.  system(n = noun.cognition) - a procedure or process for obtaining an objective; "they had to devise a system that did not depend on cooperation"

8.  system(n = noun.body) - the living body considered as made up of interdependent components forming a unified whole; "exercise helped him get the alcohol out of his system"

9.  system(n = noun.attribute) organisation, organization - an ordered manner; orderliness by virtue of being methodical and well organized; "his compulsive organization was not an endearing quality"; "we can't do it unless we establish some system around here"
Derived form adjective systematic₁, verb systemise₁, verb systemize₁

1.  An assemblage of objects arranged in regular subordination, or after some distinct method, usually logical or scientific; a complete whole of objects related by some common law, principle, or end; a complete exhibition of essential principles or facts, arranged in a rational dependence or connection; a regular union of principles or parts forming one entire thing; as, a system of philosophy; a system of government; a system of divinity; a system of botany or chemistry; a military system; the solar system. [1913 Webster]

2.  Hence, the whole scheme of created things regarded as forming one complete plan of whole; the universe. Boyle. [1913 Webster]

3.  Regular method or order; formal arrangement; plan; as, to have a system in one's business. [1913 Webster]

4.  The collection of staves which form a full score. See Score, n. [1913 Webster]

5.  An assemblage of parts or organs, either in animal or plant, essential to the performance of some particular function or functions which as a rule are of greater complexity than those manifested by a single organ; as, the capillary system, the muscular system, the digestive system, etc.; hence, the whole body as a functional unity. [1913 Webster]

6.  One of the stellate or irregular clusters of intimately united zooids which are imbedded in, or scattered over, the surface of the common tissue of many compound ascidians. [1913 Webster]

system, n.
1 a complex whole; a set of connected things or parts; an organized body of material or immaterial things.
2 a set of devices (e.g. pulleys) functioning together.
3 Physiol. a a set of organs in the body with a common structure or function (the digestive system). b the human or animal body as a whole.
4 a method; considered principles of procedure or classification. b classification.
5 orderliness.
6 a a body of theory or practice relating to or prescribing a particular form of government, religion, etc. b (prec. by the) the prevailing political or social order, esp. regarded as oppressive and intransigent.
7 a method of choosing one's procedure in gambling etc.
8 Computing a group of related hardware units or programs or both, esp. when dedicated to a single application.
9 one of seven general types of crystal structure.
10 a major group of geological strata (the Devonian system).
11 Physics a group of associated bodies moving under mutual gravitation etc.
12 Mus. the braced staves of a score.

Idiom:
get a thing out of one's system colloq. be rid of a preoccupation or anxiety. systems analysis the analysis of a complex process or operation in order to improve its efficiency, esp. by applying a computer system.

Derivative:
systemless adj.

Etymology:
F syst{egrave}me or LL systema f. Gk sustema -atos (as SYN-, histemi set up)

N  plan, scheme, design, project, proposal, proposition, suggestion, resolution, motion, precaution, deep- laid plan, system, organization, germ, sketch, skeleton, outline, draught, draft, ebauche, brouillon, rough cast, rough draft, draught copy, copy, proof, revise, drawing, scheme, schematic, graphic, chart, flow chart (representation), forecast, program, programme, prospectus, carte du pays, card, bill, protocol, order of the day, list of agenda, bill of fare, base of operations, platform, plank, slate, ticket, role, policy, contrivance, invention, expedient, receipt, nostrum, artifice, device, pipelaying, stratagem, trick, alternative, loophole, shift, last shift, measure, step, stroke, stroke of policy, master stroke, trump card, court card, cheval de bataille, great gun, coup, coup d'etat, clever stroke, bold stroke, good move, good hit, good stroke, bright thought, bright idea, intrigue, cabal, plot, conspiracy, complot, machination, subplot, underplot, counterplot, schemer, schemist, schematist, strategist, machinator, projector, artist, promoter, designer, conspirator, intrigant, planned, strategic, strategical, planning, prepared, in course of preparation, under consideration, on the tapis, on the carpet, on the floor.

N  order, regularity, uniformity, symmetry, lucidus ordo, music of the spheres, gradation, progression, series, subordination, course, even tenor, routine, method, disposition, arrangement, array, system, economy, discipline orderliness, rank, place, orderly, regular, in order, in trim, in apple-pie order, in its proper place, neat, tidy, en regle, well regulated, correct, methodical, uniform, symmetrical, shipshape, businesslike, systematic, unconfused &c (confuse), arranged, in order, methodically, in turn, in its turn, by steps, step by step, by regular steps, by regular gradations, by regular stages, by regular intervals, seriatim, systematically, by clockwork, gradatim, at stated periods, natura non facit saltum, order is heaven's first law, order from disorder sprung, ordo est parium dispariumque rerum sua loca tribue.

N  frequency, oftness, oftenness, commonness, repetition, normality, example (conformity), routine, custom (habit), regularity, uniformity, constancy, clock-work precision, punctuality, even tenor, system, routine, formula, rule, keynote, standard, model, precedent, conformity, frequent, many times, not rare, thickcoming, incessant, perpetual, continual, steady, constant, thick, uniform, repeated, customary, (habit), regular (normal), according to rule, common, everyday, usual, ordinary, familiar, old-hat, boring, well-known, trivial, often, oft, ofttimes, oftentimes, frequently, repeatedly, unseldom, not unfrequently, in quick succession, in rapid succession, many a time and oft, daily, hourly, every day, every hour, every moment, perpetually, continually, constantly, incessantly, without ceasing, at all times, daily and hourly, night and day, day and night, day after day, morning noon and night, ever anon, invariably (habit), most often, commonly, sometimes, occasionally, at times, now and then, from time to time, there being times when, toties quoties, often enough, when the mood strikes, again and again.