\Slide\, v. t. [imp. {Slid}; p. p. {Slidden}, {Slid}; p.
pr. & vb. n. {Slidding}.] [OE. sliden, AS. sl[=i]dan; akin to
MHG. sl[=i]ten, also to AS. slidor slippery, E. sled, Lith.
slidus slippery. Cf. {Sled}.]
1. To move along the surface of any body by slipping, or
   without walking or rolling; to slip; to glide; as, snow
   slides down the mountain's side.
2. Especially, to move over snow or ice with a smooth,
   uninterrupted motion, as on a sled moving by the force of
   gravity, or on the feet.
         They bathe in summer, and in winter slide. --Waller.
3. To pass inadvertently.
         Beware thou slide not by it.          --Ecclus.
                                               xxviii. 26.
4. To pass along smoothly or unobservedly; to move gently
   onward without friction or hindrance; as, a ship or boat
   slides through the water.
         Ages shall slide away without perceiving. --Dryden.
         Parts answering parts shall slide into a whole.
                                               --Pope.
5. To slip when walking or standing; to fall.
         Their foot shall slide in due time.   --Deut. xxxii.
                                               35.
6. (Mus.) To pass from one note to another with no
   perceptible cassation of sound.
7. To pass out of one's thought as not being of any
   consequence. [Obs. or Colloq.]
         With good hope let he sorrow slide.   --Chaucer.
         With a calm carelessness letting everything slide.
                                               --Sir P.
                                               Sidney.

\Slide\, v. t.
1. To cause to slide; to thrust along; as, to slide one piece
   of timber along another.
2. To pass or put imperceptibly; to slip; as, to slide in a
   word to vary the sense of a question.

\Slide\, n. [AS. sl[=i]de.]
1. The act of sliding; as, a slide on the ice.
2. Smooth, even passage or progress.
         A better slide into their business.   --Bacon.
3. That on which anything moves by sliding. Specifically:
   (a) An inclined plane on which heavy bodies slide by the
       force of gravity, esp. one constructed on a mountain
       side for conveying logs by sliding them down.
   (b) A surface of ice or snow on which children slide for
       amusement.
4. That which operates by sliding. Specifically:
   (a) A cover which opens or closes an aperture by sliding
       over it.
   (b) (Mach.) A moving piece which is guided by a part or
       parts along which it slides.
   (c) A clasp or brooch for a belt, or the like.
5. A plate or slip of glass on which is a picture or
   delineation to be exhibited by means of a magic lantern,
   stereopticon, or the like; a plate on which is an object
   to be examined with a microscope.
6. The descent of a mass of earth, rock, or snow down a hill
   or mountain side; as, a land slide, or a snow slide; also,
   the track of bare rock left by a land slide.
7. (Geol.) A small dislocation in beds of rock along a line
   of fissure. --Dana.
8. (Mus.)
   (a) A grace consisting of two or more small notes moving
       by conjoint degrees, and leading to a principal note
       either above or below.
   (b) An apparatus in the trumpet and trombone by which the
       sounding tube is lengthened and shortened so as to
       produce the tones between the fundamental and its
       harmonics.
9. (Phonetics) A sound which, by a gradual change in the
   position of the vocal organs, passes imperceptibly into
   another sound.
10. (Steam Engine)
    (a) Same as {Guide bar}, under {Guide}.
    (b) A slide valve.
{Slide box} (Steam Engine), a steam chest. See under {Steam}.
{Slide lathe}, an engine lathe. See under {Lathe}.
{Slide rail}, a transfer table. See under {Transfer}.
{Slide rest} (Turning lathes), a contrivance for holding,
   moving, and guiding, the cutting tool, made to slide on
   ways or guides by screws or otherwise, and having compound
   motion.
{Slide rule}, a mathematical instrument consisting of two
   parts, one of which slides upon the other, for the
   mechanical performance of addition and subtraction, and,
   by means of logarithmic scales, of multiplication and
   division.
{Slide valve}.
    (a) Any valve which opens and closes a passageway by
        sliding over a port.
    (b) A particular kind of sliding valve, often used in
        steam engines for admitting steam to the piston and
        releasing it, alternately, having a cuplike cavity in
        its face, through which the exhaust steam passes. It
        is situated in the steam chest, and moved by the
        valve gear. It is sometimes called a {D valve}, -- a
        name which is also applied to a semicylindrical pipe
        used as a sliding valve.