/ ˈmæmən; NAmE / noun
[ U ] ( formal , disapproving ) a way of talking about money and wealth when it has become the most important thing in sb's life and as important as a god
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WORD ORIGIN
late Middle English : via late Latin from New Testament Greek mamōnas (see Matt. 6:24, Luke 16:9–13), from Aramaic māmōn riches. The word was taken by medieval writers as the name of the devil of covetousness, and revived in this sense by Milton.