1. plural of coalface; the exposed surface of coal in a mine where coal is extracted
Usage: chiefly British; mining industry term
2. the front line or most direct point of activity or responsibility in an organization or effort
Usage: figurative; chiefly British

Examples

• Miners worked long hours at the coalfaces deep underground.
• The company invested in new equipment to improve safety at the coalfaces.
• Teachers are at the coalfaces of education, directly shaping students' futures.
• The coalfaces of the operation required constant monitoring and maintenance.
• Workers at the coalfaces faced dangerous conditions and low pay.