Ratable \Rat"a*ble\ (r[=a]t"[.a]*b'l), a. 1. Capable of being rated, or set at a certain value. [1913 Webster] Twenty orae were ratable to [at] two marks of silver. --Camden. [1913 Webster] 2. Liable to, or subjected by law to, taxation; as, ratable estate. [1913 Webster] 3. Made at a proportionate rate; as, ratable payments. -- {Rat"a*ble*ness}, n. -- {Rat"a*bly}, adv. [1913 Webster]