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Noun alteration has 3 senses
  1. change, alteration, modification - an event that occurs when something passes from one state or phase to another; "the change was intended to increase sales"; "this storm is certainly a change for the worse"; "the neighborhood had undergone few modifications since his last visit years ago"
    --1 is a kind of happening, occurrence, natural event
    --1 has particulars:
     avulsion; mutation; sublimation; surprise; birth, nativity, nascency, nascence; separation, breakup, detachment; vagary; variation, fluctuation; conversion; death, decease; decrease, lessening, drop-off; destabilization; increase; easing, moderation, relief; deformation; transition; transformation, transmutation, shift; twinkle, scintillation, sparkling; shimmer, play; transmutation; damage, harm, impairment; development; revolution; mutation, genetic mutation, chromosomal mutation; sex change; loss of consciousness
    Derived form: verb alter1
  2. alteration, modification, adjustment - the act of making something different (as e.g. the size of a garment)
    --2 is a kind of change
    --2 has particulars:
     loosening, laxation; tightening; accommodation; adaptation; tune
    Derived forms: verb alter1, verb alter3
  3. revision, alteration - the act of revising or altering (involving reconsideration and modification); "it would require a drastic revision of his opinion"
    --3 is a kind of transformation, translation
    --3 has particulars:
     distraction, misdirection; modulation; qualification; reorganization; transfiguration, metamorphosis
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