Oxford Dictionary English slide rule noun noun BrE BrE//ˈslaɪd ruːl// ; NAmE NAmE//ˈslaɪd ruːl// Add to my wordlistjump to other results a long narrow instrument like a ruler, with a middle part that slides backwards and forwards, used for calculating numbersSee slide rule in the Oxford Advanced American DictionaryCheck pronunciation: slide rule oxfordlearnersdictionaries.com
