Lewis & Short

ambŭlātĭo, ōnis, f. [ambulo], a walking about, a walk (only in prose, oftenest in Cic.).

  1. I. Lit.: ambulationem pomeridianam conficere in Academiā, Cic. Fin. 5, 1: compitaliciae, id. Att. 2, 3: ventum est in ambulationem, id. de Or. 1, 7, 26: recta, flexuosa, Cels. 1, 2.
    Of the orator on the platform: conveniet etiam ambulatio quaedam propter immodicas laudationum moras, Quint. 11, 3, 126.
    Hence,
  2. II. Transf., concr., a walk, a place for walking, a promenade (usu. near a dwelling; either covered or open): ambulatio sub dio pedes lata denos. Varr. R. R. 3, 5, 9; so Cic. Q. Fr. 3, 1, 1; 3, 1, 2; Vitr. 5, 9; Col. 1, 6, 2; Plin. 36, 12, 18, § 83.