Oxford Dictionary English sales tax nounnoun BrE BrE//ˈseɪlz tæks// ; NAmE NAmE//ˈseɪlz tæks// [uncountable, countable] Add to my wordlistjump to other results(in some countries) the part of the price you pay when you buy something that goes to the government as taxSee sales tax in the Oxford Advanced American DictionaryCheck pronunciation: sales tax oxfordlearnersdictionaries.com