Source : Webster's Revised Unabridged Dictionary (1913)

Drone \Drone\, v. i. [imp. & p. p. {Droned}; p. pr. & vb. n.
   {Droning}.] [Cf. (for sense 1) D. dreunen, G. dr["o]hnen,
   Icel. drynja to roar, drynr a roaring, Sw. dr["o]na to
   bellow, drone, Dan. dr["o]ne, Goth. drunjus sound, Gr. ?
   dirge, ? to cry aloud, Skr. dhran to sound. Cf. {Drone}, n.]
   1. To utter or make a low, dull, monotonous, humming or
      murmuring sound.

            Where the beetle wheels his droning flight. --T.
                                                  Gray.

   2. To love in idleness; to do nothing. ``Race of droning
      kings.'' --Dryden.

Source : WordNet®

droning
     adj : noisy like the sound of a bee; "the room was abuzz over the
           latest scandal" [syn: {abuzz}, {buzzing}]
     n : an unchanging intonation [syn: {monotone}, {drone}]