1. any of various naturally occurring impure mixtures of hydrocarbons
The Collaborative International Dictionary of English v.0.48:
Bitumen \Bi*tu"men\, n. [L. bitumen: cf. F. bitume. Cf.
1. Mineral pitch; a black, tarry substance, burning with a
bright flame; Jew's pitch. It occurs as an abundant
natural product in many places, as on the shores of the
Dead and Caspian Seas. It is used in cements, in the
construction of pavements, etc. See Asphalt.
2. By extension, any one of the natural hydrocarbons,
including the hard, solid, brittle varieties called
asphalt, the semisolid maltha and mineral tars, the oily
petroleums, and even the light, volatile naphthas.
WordNet (r) 3.0 (2006):
n 1: any of various naturally occurring impure mixtures of
Easton's 1897 Bible Dictionary:
Gen. 11:3, R.V., margin, rendered in the A.V. "slime"), a
mineral pitch. With this the ark was pitched (6:14. See also Ex.
2:3.) (See SLIME.)