Scottish National Dictionary (1700–)
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First published 1952 (SND Vol. III).
This entry has not been updated since then but may contain minor corrections and revisions.
DOUP-OUT, n.comb. Used in stoop and room workings, when a miner connects his drift with one formerly driven (Sc. 1886 J. Barrowman Sc. Mining Terms 25); specif.: after a small opening has been made — widening out to full road width (Ayr. 1944 D. C. Gemmel (per Edb.6)).
[Prob. from Doup, n.1, v.1]
