Merriam-Webster Collegiate Dictionary - ambulatory

 I. adjective  Date: 1598  1. of, relating to, or adapted to walking; also occurring during a walk  2. moving from place to place ; itinerant  3. capable of being altered a will is ~ until the testator's death  4.  a. able to walk about and not bedridden ~ patients  b. performed on or involving an ~ patient or an outpatient ~ medical care an ~ electrocardiogram  • ambulatorily adverb  II. noun  (plural -ries)  Date: circa 1616 a sheltered place (as in a cloister or church) for walking