Source : Webster's Revised Unabridged Dictionary (1913)

Simple \Sim"ple\, a. [Compar. {Simpler}; superl. {Simplest}.]
   [F., fr. L. simplus, or simplex, gen. simplicis. The first
   part of the Latin words is probably akin to E. same, and the
   sense, one, one and the same; cf. L. semel once, singuli one
   to each, single. Cg. {Single}, a., {Same}, a., and for the
   last part of the word cf. {Double}, {Complex}.]
   1. Single; not complex; not infolded or entangled;
      uncombined; not compounded; not blended with something
      else; not complicated; as, a simple substance; a simple
      idea; a simple sound; a simple machine; a simple problem;
      simple tasks.

   2. Plain; unadorned; as, simple dress. ``Simple truth.''
      --Spenser. ``His simple story.'' --Burns.

   3. Mere; not other than; being only.

            A medicine . . . whose simple touch Is powerful to
            araise King Pepin.                    --Shak.

   4. Not given to artifice, stratagem, or duplicity;
      undesigning; sincere; true.

            Full many fine men go upon my score, as simple as I
            stand here, and I trust them.         --Marston.

            Must thou trust Tradition's simple tongue? --Byron.

            To be simple is to be great.          --Emerson.

   5. Artless in manner; unaffected; unconstrained; natural;
      inartificial;; straightforward.

            In simple manners all the secret lies. --Young.

   6. Direct; clear; intelligible; not abstruse or enigmatical;
      as, a simple statement; simple language.

   7. Weak in intellect; not wise or sagacious; of but moderate
      understanding or attainments; hence, foolish; silly. ``You
      have simple wits.'' --Shak.

            The simple believeth every word; but the prudent man
            looketh well to his going.            --Prov. xiv.
                                                  15.

   8. Not luxurious; without much variety; plain; as, a simple
      diet; a simple way of living.

            Thy simple fare and all thy plain delights.
                                                  --Cowper.

   9. Humble; lowly; undistinguished.

            A simple husbandman in garments gray. --Spenser.

            Clergy and laity, male and female, gentle and simple
            made the fuel of the same fire.       --Fuller.

   10. (BOt.) Without subdivisions; entire; as, a simple stem; a
       simple leaf.

   11. (Chem.) Not capable of being decomposed into anything
       more simple or ultimate by any means at present known;
       elementary; thus, atoms are regarded as simple bodies.
       Cf. {Ultimate}, a.

   Note: A simple body is one that has not as yet been
         decomposed. There are indications that many of our
         simple elements are still compound bodies, though their
         actual decomposition into anything simpler may never be
         accomplished.

Simple \Sim"ple\, v. i.
   To gather simples, or medicinal plants.

         As simpling on the flowery hills she [Circe] strayed.
                                                  --Garth.

Simple \Sim"ple\, n. [F. See {Simple}, a.]
   1. Something not mixed or compounded. ``Compounded of many
      simples.'' --Shak.

   2. (Med.) A medicinal plant; -- so called because each
      vegetable was supposed to possess its particular virtue,
      and therefore to constitute a simple remedy.

            What virtue is in this remedy lies in the naked
            simple itself as it comes over from the Indies.
                                                  --Sir W.
                                                  Temple.

   3. (Weaving)
      (a) A drawloom.
      (b) A part of the apparatus for raising the heddles of a
          drawloom.

   4. (R. C. Ch.) A feast which is not a double or a semidouble.

Pendulum \Pen"du*lum\, n.; pl. {Pendulums}. [NL., fr. L.
   pendulus hanging, swinging. See {Pendulous}.]
   A body so suspended from a fixed point as to swing freely to
   and fro by the alternate action of gravity and momentum. It
   is used to regulate the movements of clockwork and other
   machinery.

   Note: The time of oscillation of a pendulum is independent of
         the arc of vibration, provided this arc be small.

   {Ballistic pendulum}. See under {Ballistic}.

   {Compensation pendulum}, a clock pendulum in which the effect
      of changes of temperature of the length of the rod is so
      counteracted, usually by the opposite expansion of
      differene metals, that the distance of the center of
      oscillation from the center of suspension remains
      invariable; as, the mercurial compensation pendulum, in
      which the expansion of the rod is compensated by the
      opposite expansion of mercury in a jar constituting the
      bob; the gridiron pendulum, in which compensation is
      effected by the opposite expansion of sets of rodsof
      different metals.

   {Compound pendulum}, an ordinary pendulum; -- so called, as
      being made up of different parts, and contrasted with
      simple pendulum.

   {Conical} or {Revolving}, {pendulum}, a weight connected by a
      rod with a fixed point; and revolving in a horizontal
      cyrcle about the vertical from that point.

   {Pendulum bob}, the weight at the lower end of a pendulum.

   {Pendulum level}, a plumb level. See under {Level}.

   {Pendulum wheel}, the balance of a watch.

   {Simple} or {Theoretical}, {pendulum}, an imaginary pendulum
      having no dimensions except length, and no weight except
      at the center of oscillation; in other words, a material
      point suspended by an ideal line.

Source : WordNet®

simple
     adj 1: having few parts; not complex or complicated or involved; "a
            simple problem"; "simple mechanisms"; "a simple
            design"; "a simple substance" [ant: {complex}]
     2: easy and not involved or complicated; "an elementary problem
        in statistics"; "elementary, my dear Watson"; "a simple
        game"; "found an uncomplicated solution to the problem"
        [syn: {elementary}, {uncomplicated}, {unproblematic}]
     3: apart from anything else; without additions or
        modifications; "only the bare facts"; "shocked by the mere
        idea"; "the simple passage of time was enough"; "the
        simple truth" [syn: {bare(a)}, {mere(a)}, {simple(a)}]
     4: exhibiting childlike simplicity and credulity; "childlike
        trust"; "dewy-eyed innocence"; "simple courtesy" [syn: {childlike},
         {wide-eyed}, {dewy-eyed}]
     5: lacking mental capacity and devoid of subtlety [syn: {dim-witted},
         {half-witted}, {simple-minded}]
     6: (botany) of leaf shapes; of leaves having no divisions or
        subdivisions [syn: {unsubdivided}] [ant: {compound}]
     7: not elaborate in style; unornamented; "a simple country
        schoolhouse"; "her black dress--simple to austerity"

simple
     n 1: any herbaceous plant having medicinal properties
     2: a person lacking intelligence or common sense [syn: {simpleton}]

Source : Free On-Line Dictionary of Computing

SIMPLE
     
        1. Early system on Datatron 200 series.  Listed in CACM
        2(5):16 (May 1959).
     
        2. Simulation of Industrial Management Problems with Lots of
        Equations.  R.K. Bennett, 1958.  Predecessor to DYNAMO, for
        IBM 704.