Bible Dictionaries
Stratum

Webster's Dictionary

(1):

(n.) A bed or layer artificially made; a course.

(2):

(n.) A bed of earth or rock of one kind, formed by natural causes, and consisting usually of a series of layers, which form a rock as it lies between beds of other kinds. Also used figuratively.

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