Pronunciation: (u-bāt'munt),[key] —n. 1. the act or state of abating or the state of being abated; reduction; decrease; alleviation; mitigation.
2. suppression or termination: abatement of a nuisance; noise abatement. 3. an amount deducted or subtracted, as from the usual price or the full tax.
4. Law. a. a reduction of a tax assessment.
b. the termination of a nuisance.
c. a wrongful entry on land made by a stranger, after the owner's death and before the owner's heir or devisee has obtained possession.
d. a decrease in the legacies of a will when the assets of an estate are insufficient to pay all general legacies in full.
5. Also called rebatement.Heraldry.a charge or mark that, when introduced into a coat of arms, indicates the owner's disgrace.