The Collaborative International Dictionary of English v.0.48:

Realty \Re"al*ty\ (-t[y^]), n. [OF. r['e]alt['e], LL. regalitas,
   fr. L. regalis. See Regal.]
   1. Royalty. [Obs.] --Chaucer.
      [1913 Webster]

   2. Loyalty; faithfulness. [R.] --Milton.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Realty \Re"al*ty\, n. [Contr. from 1st Reality.]
   1. Reality. [Obs.] --Dr. H. More.
      [1913 Webster]

   2. (Law)
      (a) Immobility, or the fixed, permanent nature of real
          property; as, chattels which savor of the realty; --
          so written in legal language for reality.
      (b) Real estate; a piece of real property. --Blackstone.
          [1913 Webster]

WordNet (r) 3.0 (2006):

realty
    n 1: property consisting of houses and land [syn: real
         property, real estate, realty, immovable]