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.

Source : WordNet®

lobby
     n 1: a large entrance or reception room or area [syn: {anteroom},
           {antechamber}, {entrance hall}, {hall}, {foyer}, {vestibule}]
     2: a group of people who try actively to influence legislation
        [syn: {pressure group}, {third house}]
     v : detain in conversation by or as if by holding on to the
         outer garments of; as for political or economic favors
         [syn: {buttonhole}]
     [also: {lobbied}]

lobbied
     See {lobby}