Source : Webster's Revised Unabridged Dictionary (1913)

Glimmer \Glim"mer\, n.
   1. A faint, unsteady light; feeble, scattered rays of light;
      also, a gleam.

            Gloss of satin and glimmer of pearls. --Tennyson.

   2. Mica. See {Mica}. --Woodsward.

   {Glimmer gowk}, an owl. [Prov. Eng.] --Tennyson.

Glimmer \Glim"mer\, v. i. [imp. & p. p. {Glimmered}; p. pr. &
   vb. n. {Glimmering}.] [Akin to G. glimmer a faint, trembling
   light, mica, glimmern to glimmer, glimmen to shine faintly,
   glow, Sw. glimma, Dan. glimre, D. glimmen, glimpen. See
   {Gleam} a ray, and cf. {Glimpse}.]
   To give feeble or scattered rays of light; to shine faintly;
   to show a faint, unsteady light; as, the glimmering dawn; a
   glimmering lamp.

         The west yet glimmers with some streaks of day. --Shak.

   Syn: To gleam; to glitter. See {Gleam}, {Flash}.

Source : WordNet®

glimmer
     n 1: a flash of light (especially reflected light) [syn: {gleam},
           {gleaming}]
     2: a slight suggestion or vague understanding; "he had no
        inkling what was about to happen" [syn: {inkling}, {intimation},
         {glimmering}]
     v : shine brightly, like a star or a light [syn: {gleam}]