abatement

1 something that is or may be subtracted entitled to a tax abatement for child care expenses Synonyms deduction, discount, reductionRelated Words giveback, kickback, rebate; dent, depreciation; decline, decrement, diminishment, diminution, drop, fall, loss; forfeit, forfeiture, penaltyNear Antonyms accretion, accrual, augmentation, boost, gain, increase, increment, raise, rise; appreciationAntonyms accession, addition

2 the amount by which something is lessened there's been a significant abatement in noise from the floor above since the upstairs neighbors installed carpets Synonyms decrease, decline, decrement, dent, depletion, depression, diminishment, diminution, drop, drop-off, fall, falloff, loss, reduction, shrinkage, step-downRelated Words deduction, subtraction; downturn, slip, slump; curtailment, cut, cutback, retrenchment, shorteningNear Antonyms accretion, accrual, accumulation, addition, supplement; continuation, extension; upswing, uptrend, upturnAntonyms boost, enlargement, gain, increase, increment, raise, rise, step-up, uptick

3 the doing away with something by formal action sought an abatement of the court proceeding on the grounds that the plaintiff had no legal standing in the case Synonyms abolition, abolishment, abrogation, annulment, avoidance, cancellation (also cancelation), defeasance, dissolution, invalidation, negation, nullification, quashing, repeal, rescindment, voidingRelated Words abortion, calling off, recall; countermand, override, overruling, overturn, veto; retraction, reversal, revocation, suspension, withdrawal; banning, enjoining, forbiddance, outlawing, prohibition; disallowance, dismissal, rejection; elimination, eradication, erasure, liquidation, removalNear Antonyms enactment, legislation; establishment, founding, institution; formalization, legalization, legitimation, legitimization, validation; passing, ratification; approval, authorization, clearance, endorsement (also indorsement), permission, sanctioning; commandment, decreeing, mandating, ordering, prescription