The Collaborative International Dictionary of English v.0.48:

Glimmering \Glim"mer*ing\, n.
   1. Faint, unsteady light; a glimmer. --South.
      [1913 Webster]

   2. A faint view or idea; a glimpse; an inkling.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

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.
   [1913 Webster]

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

   Syn: To gleam; to glitter. See Gleam, Flash.
        [1913 Webster]

WordNet (r) 3.0 (2006):

glimmering
    n 1: a slight suggestion or vague understanding; "he had no
         inkling what was about to happen" [syn: inkling,
         intimation, glimmering, glimmer]

Moby Thesaurus II by Grady Ward, 1.0:

83 Moby Thesaurus words for "glimmering":
   a little learning, amateurism, blink, blinking, blinky, broad hint,
   clue, coruscant, coruscating, coruscation, cue, dilettantism,
   dilettantship, firefly, gentle hint, gesture, glimmer, glimmerous,
   glimmery, glimpse, glisten, glistening, glister, glistering,
   glitter, glittering, glittery, glowworm, half-learning, hint,
   imperfect knowledge, implication, index, indication, inkling,
   innuendo, insinuation, intimation, kick, look, nod, nudge, prompt,
   scent, scintilla, scintillant, scintillating, scintillation,
   scintillescent, sciolism, semi-learning, shallowness, shimmer,
   shimmering, shimmery, sign, signal, slight knowledge, smattering,
   smattering of ignorance, smattering of knowledge, spangle, spangly,
   spark, sparkle, sparkling, spoor, stroboscopic light, suggestion,
   superficiality, surface-scratching, suspicion, symptom, telltale,
   tinsel, tinselly, track, twinkle, twinkling, twinkly, vague notion,
   whisper, wink