Tubman, Harriet
From Longman Dictionary of Contemporary EnglishTubman, HarrietHarriet TubmanTub‧man, Har‧riet /ˈtʌbmən, ˈhæriət/ (?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.