- of the nature of bitumen, esp. with regard to its color and combustibility
- containing or made from bitumen
Origin of bituminousFrench bitumineux from Classical Latin bitumineus
- Like or containing bitumen.
- Of or relating to bituminous coal.
(comparative more bituminous, superlative most bituminous)
- Of or pertaining to bitumen.
(countable and uncountable, plural bituminouses)
- (uncountable) Bituminous coal.
- (countable) A type or grade of bituminous coal.
From French bitumineux