The Collaborative International Dictionary of English v.0.48:

Stanza \Stan"za\ (st[a^]n"z[.a]), n.; pl. Stanzas (-z[.a]z).
   [It. stanza a room, habitation, a stanza, i. e., a stop, fr.
   L. stans, p. pr. of stare to stand. See Stand, and cf.
   Estancia, Stance, Stanchion.]
   1. A number of lines or verses forming a division of a song
      or poem, and agreeing in meter, rhyme, number of lines,
      etc., with other divisions; a part of a poem, ordinarily
      containing every variation of measure in that poem; a
      combination or arrangement of lines usually recurring,
      whether like or unlike, in measure.
      [1913 Webster]

            Horace confines himself strictly to one sort of
            verse, or stanza, in every ode.       --Dryden.
      [1913 Webster]

   2. (Arch.) An apartment or division in a building; a room or
      chamber.
      [1913 Webster]