strip mine Syllabification: (strip mine) chiefly North AmericanDefinition of strip mine noun an open-pit mine. verb (strip-mine) [with object] obtain (ore or coal) by open-pit mining:lignite coal is strip-mined at depths of 45 to 100 feet (as noun strip-mining)protected lands opened up to strip-mining for coal subject (an area of land) to open-pit mining. strip mine in other Oxford dictionaries Definition of strip mine in the British & World English dictionary