Lewis & Short

dōnārĭum, ii, n. [donum],

  1. I. the place in a temple where the votive offerings were kept, a temple treasure-chamber (perh. not ante-Aug.), Luc. 9, 516; App. M. 1, p. 221.
  2. II. Meton.
    1. A. A temple, sanctuary, altar, Verg. G. 3, 533 Serv.; Ov. F. 3, 335; id. Am. 2, 13, 13.
    2. B. A votive offering, Liv. 42, 28; Gell. 2, 10, 3; Aur. Vict. Caes. 35; Vulg. Exod. 36, 3 al.