The Collaborative International Dictionary of English v.0.48:

Ambulatory \Am"bu*la*to*ry\, a. [L. ambulatorius.]
   1. Of or pertaining to walking; having the faculty of
      walking; formed or fitted for walking; as, an ambulatory
      animal.
      [1913 Webster]

   2. Accustomed to move from place to place; not stationary;
      movable; as, an ambulatory court, which exercises its
      jurisdiction in different places.
      [1913 Webster]

            The priesthood . . . before was very ambulatory, and
            dispersed into all families.          --Jer. Taylor.
      [1913 Webster]

   3. Pertaining to a walk. [R.]
      [1913 Webster]

            The princess of whom his majesty had an ambulatory
            view in his travels.                  --Sir H.
                                                  Wotton.
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   4. (Law) Not yet fixed legally, or settled past alteration;
      alterable; as, the dispositions of a will are ambulatory
      until the death of the testator.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Ambulatory \Am"bu*la*to*ry\, n.; pl. Ambulatories. [Cf. LL.
   ambulatorium.] (Arch.)
   A place to walk in, whether in the open air, as the gallery
   of a cloister, or within a building.
   [1913 Webster]

WordNet (r) 3.0 (2006):

ambulatory
    adj 1: relating to or adapted for walking; "an ambulatory
           corridor"
    2: able to walk about; "the patient is ambulatory" [syn:
       ambulant, ambulatory]
    n 1: a covered walkway (as in a cloister); "it has an ambulatory
         and seven chapels"