炭たん田でんたんでんCommon wordMeanings1nouncoalfield; coal fieldRefers to a region where coal is mined. Common in geographical and industrial contexts.この地ち域いきには大おおきな炭たん田でんがある。There is a large coalfield in this region.炭たん田でんの開かい発はつが進すすんでいる。Development of the coalfield is progressing.