Oxford Dictionary English filler cap nounnoun BrE BrE//ˈfɪlə kæp// ; NAmE NAmE//ˈfɪlər kæp// Parts of a car Add to my wordlistjump to other resultsa lid for covering the end of the pipe through which petrol/gas is put into a vehicle See related entries: Parts of a carCheck pronunciation: filler cap oxfordlearnersdictionaries.com
