Definition of coalface noun from the Oxford Advanced Learner's Dictionary

 

coalface

 noun
noun
BrE BrE//ˈkəʊlfeɪs//
 
; NAmE NAmE//ˈkoʊlfeɪs//
 
(also face)
 
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  • the place deep inside a mine where the coal is cut out of the rock The miners had to crawl to reach the coalface.
  • Idioms (British English) where the real work is done, not just where people talk about it Many of the best ideas come from doctors at the coalface.