/ ˈbɪtʃəmən; NAmE bəˈtuːmən; -ˈtjuː-/ noun [ U ]
1.
a black sticky substance obtained from oil, used for covering roads or roofs
2.
( AustralE , informal ) the surface of a road that is covered with tar :
a kilometre and a half of bitumen
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WORD ORIGIN
late Middle English (denoting naturally occurring asphalt used as mortar): from Latin .