alteration

 
Pronunciation: /ɔːltəˈreɪʃ(ə)n, ˈɒl-/

noun

[mass noun]
  • the action or process of altering or being altered: careful alteration of old buildings [count noun]: alterations had to be made

Derivatives

alterative

adjective

Origin:

late Middle English: from Old French, or from late Latin alteratio(n-), from the verb alterare (see alter)