/ Dictionary / Index A alteration: Meaning and Definition of Find definitions for: al•ter•a•tion Pronunciation: (ôl"tu-rā'shun), [key] — n. 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. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: alteration (Thesaurus) alterant alterative Related Content Daily Word Quiz: immense Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language