The Collaborative International Dictionary of English v.0.48:

Curtailment \Cur*tail"ment\ (k?r-t?l"ment), n.
   The act or result of curtailing or cutting off. --Bancroft.
   [1913 Webster]

WordNet (r) 3.0 (2006):

curtailment
    n 1: the temporal property of being cut short
    2: the act of withholding or withdrawing some book or writing
       from publication or circulation; "a suppression of the
       newspaper" [syn: suppression, curtailment]
    3: the reduction of expenditures in order to become financially
       stable [syn: retrenchment, curtailment, downsizing]

Moby Thesaurus II by Grady Ward, 1.0:

127 Moby Thesaurus words for "curtailment":
   abbreviation, abridgment, abstract, apocope, arrest, arrestation,
   astriction, astringency, attrition, bereavement, bottleneck,
   cervix, check, cheeseparing, circumscription, coarctation,
   compactedness, compaction, compression, compressure, concentration,
   condensation, consolidation, conspectus, constraint, constriction,
   constringency, contraction, contracture, control, cooling,
   cooling down, cooling off, curb, cut, cutback, cutting,
   deceleration, decrease, decrement, depletion, depreciation,
   deprivation, deprivement, derogation, detraction, diminuendo,
   diminution, dip, disburdening, disburdenment, disentitlement,
   disparagement, divestment, economization, economizing, elision,
   ellipsis, epitome, extraction, foreshortening, hindrance,
   hourglass, hourglass figure, impairment, inhibition, injunction,
   interdict, isthmus, knitting, legal restraint, lessening,
   low growth rate, monopoly, narrow place, narrowing, neck, precis,
   privation, prohibition, protection, protectionism,
   protective tariff, puckering, pullback, pursing, rationing, recap,
   recapitulation, reduction, reduction of expenses,
   reduction of spending, rein, relieving, remission, restraint,
   restraint of trade, retardation, retraction, retrenchment,
   rollback, saving, scraping, scrimping, self-control, shortening,
   shrinkage, skimping, slowdown, slowing down, solidification,
   sparing, stranglement, strangulation, striction, stricture,
   summary, summation, syncope, synopsis, systole, tariff wall,
   telescoping, thought control, truncation, wasp waist, wrinkling