Source : Webster's Revised Unabridged Dictionary (1913)

Lobby \Lob"by\, v. i. [imp. & p. p. {Lobbied}; p. pr. & vb. n.
   {Lobbying}.]
   To address or solicit members of a legislative body in the
   lobby or elsewhere, with the purpose to influence their
   votes.[U.S.] --Bartlett.