Source : Webster's Revised Unabridged Dictionary (1913)

Abuzz \A*buzz"\, a. [Pref. a- + buzz.]
   In a buzz; buzzing. [Colloq.] --Dickens.

Source : WordNet®

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