Webster’s Revised Unabridged Dictionary · 1913 Colliery Col′lier·y, n.; pl. Collieries (#). [Cf. Coalery, Collier.] 1. The place where coal is dug; a coal mine, and the buildings, etc., belonging to it. 2. The coal trade. [Obs.] Johnson. ‹ Collier Colliflower ›