ratable Syllabification: (rat·a·ble)Pronunciation: /ˈrātəbəl/Definition of ratable adjective able to be rated or estimated. Derivatives ratabilityPronunciation: /ˌrātəˈbilətē/ noun ratablyPronunciation: /-blē/ adverb ratable in other Oxford dictionaries Definition of ratable in the British & World English dictionary