Source : Webster's Revised Unabridged Dictionary (1913)

Waver \Wa"ver\, v. i. [imp. & p. p. {Wavered}; p. pr. & vb. n.
   {Wavering}.] [OE. waveren, from AS. w[ae]fre wavering,
   restless. See {Wave}, v. i.]
   1. To play or move to and fro; to move one way and the other;
      hence, to totter; to reel; to swing; to flutter.

            With banners and pennons wavering with the wind.
                                                  --Ld. Berners.

            Thou wouldst waver on one of these trees as a terror
            to all evil speakers against dignities. --Sir W.
                                                  Scott.

   2. To be unsettled in opinion; to vacillate; to be
      undetermined; to fluctuate; as, to water in judgment.

            Let us hold fast . . . without wavering. --Heb. x.
                                                  23.

            In feeble hearts, propense enough before To waver,
            or fall off and join with idols.      --Milton.

   Syn: To reel; totter; vacillate. See {Fluctuate}.

Waver \Wa"ver\, n. [From {Wave}, or {Waver}, v.]
   A sapling left standing in a fallen wood. [Prov. Eng.]
   --Halliwell.

Source : WordNet®

waver
     n 1: someone who communicates by waving
     2: the act of pausing uncertainly; "there was a hesitation in
        his speech" [syn: {hesitation}, {falter}, {faltering}]
     3: the act of moving back and forth [syn: {flutter}, {flicker}]
     v 1: pause or hold back in uncertainty or unwillingness;
          "Authorities hesitate to quote exact figures" [syn: {hesitate},
           {waffle}]
     2: be unsure or weak; "Their enthusiasm is faltering" [syn: {falter}]
     3: move hesitatingly, as if about to give way [syn: {falter}]
     4: move or sway in a rising and falling or wavelike pattern;
        "the line on the monitor vacillated" [syn: {fluctuate}, {vacillate}]
     5: move back and forth very rapidly; "the candle flickered"
        [syn: {flicker}, {flitter}, {flutter}, {quiver}]
     6: sway to and fro [syn: {weave}]
     7: give off unsteady sounds, alternating in amplitude or
        frequency [syn: {quaver}]