Lewis & Short

taxātĭo, ōnis, f. [taxo], a rating, valuing, appraisal, estimation.

  1. I. In gen. (cf. aestimatio): ejus rei taxationem nos fecimus, Cic. Fragm. Or. pro Tull. 7: intra pecuniam versabitur taxatio, Sen. Ben. 3, 10, 2: hoc super omnem taxationem est, Plin. 7, 12, 10, § 56: taxatio (succini) in deliciis tanta, ut, etc., id. 37, 3, 12, § 49: taxationem confirmans, id. 9, 35, 58, § 120: latifundī, id. 13, 15, 29, § 92.
  2. II. In partic., in jurid. lang., a defining or limiting clause in wills, contracts, etc., Dig. 31, 1, 42 fin.; 33, 6, 5; 36, 3, 6.