[mass noun](often in legal use) the ending, reduction, or lessening of something (常作法律用语)结束,减少,减轻 noise abatement. 减少噪声。 [count noun]an abatement in the purchase price. 降低买价。
语源
Middle English: from Anglo-Norman French, from Old French abatre 'fell, put an end to' (see abate)