Etymology
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miner (n.)

c. 1300 (early 13c. as a surname), "one who mines, a person engaged in digging for metals or minerals or in digging a military mine," from Old French mineour (13c.), agent noun from miner "to mine" (see mine (v.1)).

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Definitions of miner

miner (n.)
laborer who works in a mine;
Synonyms: mineworker
From wordnet.princeton.edu