01 n. The act of altering or making different.
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1.
The act of altering or making different.“Alteration, though it be from worse to better, hath in it incoveniences.” — Hooker.
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2.
The state of being altered; a change made in the form or nature of a thing; changed condition.“Ere long might perceive Strange alteration in me.” — Milton.“Appius Claudius admitted to the senate the sons of those who had been slaves; by which, and succeeding alterations, that council degenerated into a most corrupt.” — Swift.