Source : Webster's Revised Unabridged Dictionary (1913)

Glide \Glide\, n. (A["e]ronautics)
   Movement of a glider, a["e]roplane, etc., through the air
   under gravity or its own movement.

Glide \Glide\, v. i. (A["e]ronautics)
   To move through the air by virtue of gravity or momentum; to
   volplane.

Glide \Glide\, v. i. [imp. & p. p. {Glided}; p. pr. & vb. n.
   {Gliding}.] [AS. gl[=i]dan; akin to D. glijden, OHG.
   gl[=i]tan, G. gleiten, Sw. glida, Dan. glide, and prob. to E.
   glad.]
   1. To move gently and smoothly; to pass along without noise,
      violence, or apparent effort; to pass rapidly and easily,
      or with a smooth, silent motion, as a river in its
      channel, a bird in the air, a skater over ice.

            The river glideth at his own sweet will.
                                                  --Wordsworth.

   2. (Phon.) To pass with a glide, as the voice.

Glide \Glide\, n. (Zo["o]l.)
   The glede or kite.

Glide \Glide\, n.
   1. The act or manner of moving smoothly, swiftly, and without
      labor or obstruction.

            They prey at last ensnared, he dreadful darts, With
            rapid glide, along the leaning line.  --Thomson.

            Seeing Orlando, it unlink'd itself, And with
            indented glides did slip away.        --Shak.

   2. (Phon.) A transitional sound in speech which is produced
      by the changing of the mouth organs from one definite
      position to another, and with gradual change in the most
      frequent cases; as in passing from the begining to the end
      of a regular diphthong, or from vowel to consonant or
      consonant to vowel in a syllable, or from one component to
      the other of a double or diphthongal consonant (see Guide
      to Pronunciation, [sect][sect] 19, 161, 162). Also (by
      Bell and others), the vanish (or brief final element) or
      the brief initial element, in a class of diphthongal
      vowels, or the brief final or initial part of some
      consonants (see Guide to Pronunciation, [sect][sect] 18,
      97, 191).

   Note: The on-glide of a vowel or consonant is the glidemade
         in passing to it, the off-glide, one made in passing
         from it. Glides of the other sort are distinguished as
         initial or final, or fore-glides and after-glides. For
         voice-glide, see Guide to Pronunciation, [sect][sect]
         17, 95.

Source : WordNet®

glide
     n 1: a vowel-like sound that serves as a consonant [syn: {semivowel}]
     2: the act of moving smoothly along a surface while remaining
        in contact with it; "his slide didn't stop until the
        bottom of the hill"; "the children lined up for a coast
        down the snowy slope" [syn: {slide}, {coast}]
     3: the activity of flying a glider [syn: {gliding}, {sailplaning},
         {soaring}, {sailing}]

glide
     v 1: move smoothly and effortlessly
     2: fly in or as if in a glider plane
     3: cause to move or pass silently, smoothly, or imperceptibly