Oxford Dictionary English work-to-rule noun noun BrE BrE//ˌwɜːk tə ˈruːl// ; NAmE NAmE//ˌwɜːrk tə ˈruːl// [usually singular] Add to my wordlistjump to other resultsa situation in which workers refuse to do any work that is not in their contracts, in order to protest about something compare go-slowCheck pronunciation: work-to-rule oxfordlearnersdictionaries.com