the amount by which sth, especially income, is less than it should be 亏损；短少◆a budget deficiency of $96 billion 960 亿元的预算缺口SYNdeficit
() () a situation in which sb owes more tax than they have shown on their tax forms; the amount they owe 欠税；欠税额◆The IRS assessed a deficiency of $40 000 against the estate. 美国国税局评估的不动产税欠税额为 4 万元。