[ awl-tuh-rey-shuh n ]
/ ˌɔl təˈreɪ ʃən /


the act or process of altering; the state of being altered: Alteration will improve the dress.
a change; modification or adjustment: There has been an alteration in our plans.

Nearby words

  1. alter ego,
  2. alter idem,
  3. alter.,
  4. alterable,
  5. alterant,
  6. alterative,
  7. altercate,
  8. altercation,
  9. altered chord,
  10. altered state of consciousness

Origin of alteration

1350–1400; Middle English alteracioun < Medieval Latin alterātiōn- (stem of alterātiō). See alter, -ation

Related formspre·al·ter·a·tion, nounpro·al·ter·a·tion, adjectivere·al·ter·a·tion, noun Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for alteration

British Dictionary definitions for alteration


/ (ˌɔːltəˈreɪʃən) /


an adjustment, change, or modification
the act of altering or state of being altered
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for alteration



late 14c., "action of altering," from Old French alteracion (14c.) "change, alteration," and directly from Medieval Latin alterationem (nominative alteratio), noun of action from past participle stem of Late Latin alterare (see alter). Meaning "change in character or appearance" is from 1530s; that of "change in ready-made clothes to suit a customer's specifications" is from 1901. Related: Alterations.

Online Etymology Dictionary, © 2010 Douglas Harper