- a sandstone impregnated with hydrocarbons, esp such deposits in Alberta, Canada
WordReference Random House Unabridged Dictionary of American English © 2026
oil′ sand′, [Geol.]
- Geologya sand or sandstone containing oil or tarry residue in the pore spaces.
- 1880–85, American.
Collins Concise English Dictionary © HarperCollins Publishers::
oil sand n