Tub ‧ man, Har ‧ riet /ˈtʌbmən, ˈhæriət/ BrE AmE
(?1820–1913) a US ↑ slave who escaped to the northern US (where slavery was not allowed) and became an important member of the ↑ Underground Railroad , a system for helping slaves who were trying to escape. She also worked for the army of the North in the ↑ civil war .