\Lob"by\, n.; pl. {Lobbies}. [LL. lobium, lobia, laubia, a
covered portico fit for walking, fr. OHG. louba, G. laube,
arbor. See {Lodge}.]
1. (Arch.) A passage or hall of communication, especially
   when large enough to serve also as a waiting room. It
   differs from an antechamber in that a lobby communicates
   between several rooms, an antechamber to one only; but
   this distinction is not carefully preserved.
2. That part of a hall of legislation not appropriated to the
   official use of the assembly; hence, the persons,
   collectively, who frequent such a place to transact
   business with the legislators; any persons, not members of
   a legislative body, who strive to influence its
   proceedings by personal agency

\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.

\Lob"by\, v. t.
To urge the adoption or passage of by soliciting members of a
legislative body; as, to lobby a bill. [U.S.]