D defs.my
Entry 4 senses Webster, 1913

Abatement

/(-ment)/ · A·bate·ment · IPA /əˈbeɪt.mənt/
01 n. The act of abating, or the state of being abated; a lessening, diminution, or reduction; removal or putting an end to; as, the abatement of…
  1. 1.
    The act of abating, or the state of being abated; a lessening, diminution, or reduction; removal or putting an end to; as, the abatement of a nuisance is the suppression thereof.
  2. 2.
    The amount abated; that which is taken away by way of reduction; deduction; decrease; a rebate or discount allowed.
  3. 3.
    A mark of dishonor on an escutcheon.(Her.)
  4. 4.
    The entry of a stranger, without right, into a freehold after the death of the last possessor, before the heir or devisee.(Law)
Phrases & compounds
Defense in abatement — plea to the effect that from some formal defect (e.g. misnomer, lack of jurisdiction) the proceedings should be abated.