[transitive] to make coins out of metal（用金属）铸币，造硬币 ●be ˈcoining it (in) ●be ˈcoining money (both BrE) (informal) to earn a lot of money quickly or easily赚大钱；发大财；暴富◆He has a huge expenses allowance and must be coining it in.他有巨额的开销补助，一定会发大财。