Source : Webster's Revised Unabridged Dictionary (1913)

Slip \Slip\, n.
   1. (Mach.)
      (a) The retrograde movement on a pulley of a belt as it
          slips.
      (b) In a link motion, the undesirable sliding movement of
          the link relatively to the link block, due to swinging
          of the link.

   2. (Elec.) The difference between the actual and synchronous
      speed of an induction motor.

   3. (Marine Insurance) A memorandum of the particulars of a
      risk for which a policy is to be executed. It usually
      bears the broker's name and is initiated by the
      underwrites.

Slip \Slip\, v. i. [imp. & p. p. {Slipped}; p. pr. & vb. n.
   {Slipping}.] [OE. slippen; akin to LG. & D. slippen, MHG.
   slipfen (cf. Dan. slippe, Sw. slippa, Icel. sleppa), and fr.
   OE. slipen, AS. sl[=i]pan (in comp.), akin to G. schleifen to
   slide, glide, drag, whet, OHG. sl[=i]fan to slide, glide,
   make smooth, Icel. sl[=i]pa to whet; cf. also AS. sl?pan,
   Goth. sliupan, OS. slopian, OHG. sliofan, G. schliefen,
   schl?pfen, which seem to come from a somewhat different root
   form. Cf. {Slope}, n.]
   1. To move along the surface of a thing without bounding,
      rolling, or stepping; to slide; to glide.

   2. To slide; to lose one's footing or one's hold; not to
      tread firmly; as, it is necessary to walk carefully lest
      the foot should slip.

   3. To move or fly (out of place); to shoot; -- often with
      out, off, etc.; as, a bone may slip out of its place.

   4. To depart, withdraw, enter, appear, intrude, or escape as
      if by sliding; to go or come in a quiet, furtive manner;
      as, some errors slipped into the work.

            Thus one tradesman slips away, To give his partner
            fairer play.                          --Prior.

            Thrice the flitting shadow slipped away. --Dryden.

   5. To err; to fall into error or fault.

            There is one that slippeth in his speech, but not
            from his heart.                       --Ecclus. xix.
                                                  16.

   {To let slip}, to loose from the slip or noose, as a hound;
      to allow to escape.

            Cry, ``Havoc,'' and let slip the dogs of war.
                                                  --Shak.

Slip \Slip\, n. [AS. slipe, slip.]
   1. The act of slipping; as, a slip on the ice.

   2. An unintentional error or fault; a false step.

            This good man's slip mended his pace to martyrdom.
                                                  --Fuller.

   3. A twig separated from the main stock; a cutting; a scion;
      hence, a descendant; as, a slip from a vine.

            A native slip to us from foreign seeds. --Shak.

            The girlish slip of a Sicilian bride. --R. Browning.

   4. A slender piece; a strip; as, a slip of paper.

            Moonlit slips of silver cloud.        --Tennyson.

            A thin slip of a girl, like a new moon Sure to be
            rounded into beauty soon.             --Longfellow.

   5. A leash or string by which a dog is held; -- so called
      from its being made in such a manner as to slip, or become
      loose, by relaxation of the hand.

            We stalked over the extensive plains with Killbuck
            and Lena in the slips, in search of deer. --Sir S.
                                                  Baker.

   6. An escape; a secret or unexpected desertion; as, to give
      one the slip. --Shak.

   7. (Print.) A portion of the columns of a newspaper or other
      work struck off by itself; a proof from a column of type
      when set up and in the galley.

   8. Any covering easily slipped on. Specifically:
      (a) A loose garment worn by a woman.
      (b) A child's pinafore.
      (c) An outside covering or case; as, a pillow slip.
      (d) The slip or sheath of a sword, and the like. [R.]

   9. A counterfeit piece of money, being brass covered with
      silver. [Obs.] --Shak.

   10. Matter found in troughs of grindstones after the grinding
       of edge tools. [Prov. Eng.] --Sir W. Petty.

   11. Potter's clay in a very liquid state, used for the
       decoration of ceramic ware, and also as a cement for
       handles and other applied parts.

   12. A particular quantity of yarn. [Prov. Eng.]

   13. An inclined plane on which a vessel is built, or upon
       which it is hauled for repair.

   14. An opening or space for vessels to lie in, between
       wharves or in a dock; as, Peck slip. [U. S.]

   15. A narrow passage between buildings. [Eng.]

   16. A long seat or narrow pew in churches, often without a
       door. [U. S.]

   17. (Mining.) A dislocation of a lead, destroying continuity.
       --Knight.

   18. (Engin.) The motion of the center of resistance of the
       float of a paddle wheel, or the blade of an oar, through
       the water horozontally, or the difference between a
       vessel's actual speed and the speed which she would have
       if the propelling instrument acted upon a solid; also,
       the velocity, relatively to still water, of the backward
       current of water produced by the propeller.

   19. (Zo["o]l.) A fish, the sole.

   20. (Cricket) A fielder stationed on the off side and to the
       rear of the batsman. There are usually two of them,
       called respectively {short slip}, and {long slip}.

Slip \Slip\, v. t.
   1. To cause to move smoothly and quickly; to slide; to convey
      gently or secretly.

            He tried to slip a powder into her drink.
                                                  --Arbuthnot.

   2. To omit; to loose by negligence.

            And slip no advantage That my secure you. --B.
                                                  Jonson.

   3. To cut slips from; to cut; to take off; to make a slip or
      slips of; as, to slip a piece of cloth or paper.

            The branches also may be slipped and planted.
                                                  --Mortimer.

   4. To let loose in pursuit of game, as a greyhound.

            Lucento slipped me like his greyhound. --Shak.

   5. To cause to slip or slide off, or out of place; as, a
      horse slips his bridle; a dog slips his collar.

   6. To bring forth (young) prematurely; to slink.

   {To slip a cable}. (Naut.) See under {Cable}.

   {To slip off}, to take off quickly; as, to slip off a coat.
      

   {To slip on}, to put on in haste or loosely; as, to slip on a
      gown or coat.

Source : WordNet®

slip
     n 1: a socially awkward or tactless act [syn: {faux pas}, {gaffe},
           {solecism}, {gaucherie}]
     2: a minor inadvertent mistake usually observed in speech or
        writing or in small accidents or memory lapses etc. [syn:
        {slip-up}, {miscue}, {parapraxis}]
     3: potter's clay that is thinned and used for coating or
        decorating ceramics
     4: a part (sometimes a root or leaf or bud) removed from a
        plant to propagate a new plant through rooting or grafting
        [syn: {cutting}]
     5: a young and slender person; "he's a mere slip of a lad"
     6: a place where a craft can be made fast [syn: {mooring}, {moorage},
         {berth}]
     7: an accidental misstep threatening (or causing) a fall; "he
        blamed his slip on the ice"; "the jolt caused many slips
        and a few spills" [syn: {trip}]
     8: a slippery smoothness; "he could feel the slickness of the
        tiller" [syn: {slickness}, {slick}, {slipperiness}]
     9: artifact consisting of a narrow flat piece of material [syn:
         {strip}]
     10: a small sheet of paper; "a receipt slip" [syn: {slip of
         paper}]
     11: a woman's sleeveless undergarment [syn: {chemise}, {shimmy},
          {shift}, {teddies}, {teddy}]
     12: bed linen consisting of a cover for a pillow; "the burglar
         carried his loot in a pillowcase" [syn: {case}, {pillowcase},
          {pillow slip}]
     13: an unexpected slide [syn: {skid}, {sideslip}]
     14: a flight maneuver; aircraft slides sideways in the air [syn:
          {sideslip}]
     15: the act of avoiding capture (especially by cunning) [syn: {elusion},
          {eluding}]
     [also: {slipping}, {slipped}]

slip
     v 1: move stealthily; "The ship slipped away in the darkness"
          [syn: {steal}]
     2: insert inconspicuously or quickly or quietly; "He slipped
        some money into the waiter's hand"
     3: move obliquely or sideways, usually in an uncontrolled
        manner; "the wheels skidded against the sidewalk" [syn: {skid},
         {slue}, {slew}, {slide}]
     4: get worse; "My grades are slipping" [syn: {drop off}, {drop
        away}, {fall away}]
     5: move smoothly and easily
     6: to make a mistake or be incorrect [syn: {err}, {mistake}]
     7: pass on stealthily; "He slipped me the key when nobody was
        looking" [syn: {sneak}]
     8: pass out of one's memory [syn: {slip one's mind}]
     9: move out of position; "dislocate joints"; "the artificial
        hip joint luxated and had to be put back surgically" [syn:
         {dislocate}, {luxate}, {splay}]
     [also: {slipping}, {slipped}]

Source : Free On-Line Dictionary of Computing

SLIP
     
        1. {Serial Line Internet Protocol}.
     
        2. Symmetric LIst Processsor.  Early 1960's list processing
        subroutine package for {Fortran} by J. Weizenbaum.  Later also
        embedded in {MAD} and {ALGOL}.  ["Symmetric List Processor",
        J. Weizenbaum CACM 6:524-544(1963).  Sammet 1969, p.387].