[ room-uh n-pil-er, roo m- ]
/ ˈrum ənˈpɪl ər, ˈrʊm- /

adjective Mining.

noting a means of extracting coal or other minerals from underground deposits by first cutting out rooms, then robbing the pillars between them; pillar-and-breast.

Nearby words

  1. room divider,
  2. room father,
  3. room mother,
  4. room service,
  5. room temperature,
  6. roomer,
  7. roomette,
  8. roomful,
  9. roomie,
  10. rooming house

Compare longwall. Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019