Bible Dictionaries
Underlayer

Webster's Dictionary

(1):

(n.) A perpendicular shaft sunk to cut the lode at any required depth.

(2):

(n.) One who, or that which, underlays or is underlaid; a lower layer.

Bibliography Information
Webster, Noah. Entry for 'Underlayer'. Noah Webster's American Dictionary. https://www.studylight.org/​dictionaries/​eng/​web/​u/underlayer.html. 1828.