the exposed seam of coal in a mine
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
How to use coalface in a sentence
It had been a long, hard day at the audition coalface, with very little talent on display.
It was cool, but not cold, and the wind smelled more strongly of coalface than ever.Someone Comes to Town, Someone Leaves Town | Cory Doctorow