The Collaborative International Dictionary of English v.0.48:

Scheme \Scheme\, n. [L. schema a rhetorical figure, a shape,
   figure, manner, Gr. ?, ?, form, shape, outline, plan, fr. ?,
   ?, to have or hold, to hold out, sustain, check, stop; cf.
   Skr. sah to be victorious, to endure, to hold out, AS. sige
   victory, G. sieg. Cf. Epoch, Hectic, School.]
   1. A combination of things connected and adjusted by design;
      a system.
      [1913 Webster]

            The appearance and outward scheme of things.
                                                  --Locke.
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            Such a scheme of things as shall at once take in
            time and eternity.                    --Atterbury.
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            Arguments . . . sufficient to support and
            demonstrate a whole scheme of moral philosophy. --J.
                                                  Edwards.
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            The Revolution came and changed his whole scheme of
            life.                                 --Macaulay.
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   2. A plan or theory something to be done; a design; a
      project; as, to form a scheme.
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            The stoical scheme of supplying our wants by lopping
            off our desires, is like cutting off our feet when
            we want shoes.                        --Swift.
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   3. Any lineal or mathematical diagram; an outline.
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            To draw an exact scheme of Constantinople, or a map
            of France.                            --South.
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   4. (Astrol.) A representation of the aspects of the celestial
      bodies for any moment or at a given event.
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            A blue silk case, from which was drawn a scheme of
            nativity.                             --Sir W.
                                                  Scott.
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   Syn: Plan; project; contrivance; purpose; device; plot.

   Usage: Scheme, Plan. Scheme and plan are subordinate to
          design; they propose modes of carrying our designs
          into effect. Scheme is the least definite of the two,
          and lies more in speculation. A plan is drawn out into
          details with a view to being carried into effect. As
          schemes are speculative, they often prove visionary;
          hence the opprobrious use of the words schemer and
          scheming. Plans, being more practical, are more
          frequently carried into effect.
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                He forms the well-concerted scheme of mischief;
                'T is fixed, 't is done, and both are doomed to
                death.                            --Rowe.
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                Artists and plans relieved my solemn hours;
                I founded palaces, and planted bowers. --Prior.
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The Collaborative International Dictionary of English v.0.48:

Scheme \Scheme\, v. t. [imp. & p. p. Schemed; p. pr. & vb. n.
   Scheming.]
   To make a scheme of; to plan; to design; to project; to plot.
   [1913 Webster]

         That wickedness which schemed, and executed, his
         destruction.                             --G. Stuart.
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The Collaborative International Dictionary of English v.0.48:

Scheme \Scheme\, v. i.
   To form a scheme or schemes.
   [1913 Webster]

WordNet (r) 3.0 (2006):

scheme
    n 1: an elaborate and systematic plan of action [syn: scheme,
         strategy]
    2: a statement that evades the question by cleverness or
       trickery [syn: dodge, dodging, scheme]
    3: a group of independent but interrelated elements comprising a
       unified whole; "a vast system of production and distribution
       and consumption keep the country going" [syn: system,
       scheme]
    4: an internal representation of the world; an organization of
       concepts and actions that can be revised by new information
       about the world [syn: schema, scheme]
    5: a schematic or preliminary plan [syn: outline, schema,
       scheme]
    v 1: form intrigues (for) in an underhand manner [syn: scheme,
         intrigue, connive]
    2: devise a system or form a scheme for

Moby Thesaurus II by Grady Ward, 1.0:

264 Moby Thesaurus words for "scheme":
   Byzantine intrigues, action, anagnorisis, angle, approach,
   architectonics, architecture, argument, arrangement, art,
   artful dodge, artifice, atmosphere, attack, background,
   backstairs influence, bag of tricks, blind, blueprint,
   blueprinting, bluff, bosey, brew, cabal, calculate, calculation,
   catalog, catalogue raisonne, catastrophe, catch, characterization,
   chart, charting, chicanery, chouse, collude, collusion, color,
   complication, complicity, complot, conception, concoct,
   confederacy, connections, connivance, connive, conspiracy,
   conspire, continuity, contrivance, contrive, contriving, cook up,
   countermine, counterplot, coup, course of action, covin, craft,
   curve, curve-ball, cute trick, deals, deceit, deep-laid plot,
   denouement, design, development, device, devise, diagram,
   dirty deal, dirty trick, disposition, dodge, draft, drawing,
   engineer, engineering, enterprise, envisagement, episode,
   expedient, exposition, fable, fakement, falling action, fast deal,
   feint, fetch, ficelle, figuring, finagle, finagling, finesse, fix,
   foresight, forethink, forethought, formulate, frame, frame up,
   frame-up, gambit, game, game plan, games, gerrymander, gimmick,
   googly, graph, graphing, grift, ground plan, guidelines, hatch,
   hatch a plot, hatch up, hocus-pocus, idea, incident,
   influence peddling, intention, intrigue, intrigues, jockey, joker,
   juggle, jugglery, knavery, lay a plot, layout, line, lineup,
   little game, lobbying, lobbyism, local color, long-range plan,
   machinate, machination, maneuver, maneuvering, manipulate,
   manipulation, map, mapping, master plan, method, methodology, mood,
   motif, move, movement, mythos, operate, operations research, order,
   ordering, organization, organize, outline, pack, pack the deal,
   pass, pattern, peripeteia, plan, planning, planning function,
   play games, plot, plotting, ploy, ploys, practice, prearrange,
   prearrangement, preconcert, preconsider, precontrive, predesign,
   predetermine, premeditate, preorder, preresolve, presentation,
   procedure, program, program of action, project, projection,
   proposal, proposition, pull strings, racket, rationalization,
   recognition, red herring, rig, rigging, rising action, ropes, ruse,
   scenario, schedule, schema, schematic, schematism, schematization,
   scheme of arrangement, schemery, schemes, scheming, scurvy trick,
   secondary plot, set up, setup, sew up, shift, slant, sleight,
   sleight of hand, sleight-of-hand trick, stack the cards, story,
   stratagem, strategic plan, strategy, strings, structure, subject,
   subplot, subterfuge, suggestion, switch, system, systematization,
   table, table of contents, tactic, tactical plan, tactics,
   technique, the big picture, the picture, thematic development,
   theme, tone, topic, trick, trickery, twist, underplot, wangle, way,
   web of intrigue, wile, wily device, wire-pulling, wires,
   work out beforehand, working plan



The Free On-line Dictionary of Computing (30 December 2018):

Scheme

    (Originally "Schemer", by analogy with Planner
   and Conniver).  A small, uniform Lisp dialect with clean
   semantics, developed initially by Guy Steele and Gerald
   Sussman in 1975.  Scheme uses applicative order reduction
   and lexical scope.  It treats both functions and
   continuations as first-class objects.

   One of the most used implementations is DrScheme, others
   include Bigloo, Elk, Liar, Orbit, Scheme86 (Indiana
   U), SCM, MacScheme (Semantic Microsystems), PC Scheme
   (TI), MIT Scheme, and T.

   See also Kamin's interpreters, PSD, PseudoScheme,
   Schematik, Scheme Repository, STk, syntax-case, Tiny
   Clos, Paradigms of AI Programming.

   There have been a series of revisions of the report defining
   Scheme, known as RRS (Revised Report on Scheme), R2RS
   (Revised Revised Report ..), R3RS, R3.99RS, R4RS.

   Scheme resources (http://schemers.org/).

   Mailing list: scheme@mc.lcs.mit.edu.

   [IEEE P1178-1990, "IEEE Standard for the Scheme Programming
   Language", ISBN 1-55937-125-0].

   (2003-09-14)