The process of becoming disorganized or the state of lacking organization; disorder, confusion, or breakdown of systematic arrangement.
From disorganize (verb) + -ation (noun suffix creating actions or states). The -ation suffix is typically used for verbs ending in -ize/-ise in both American and British English.
The noun form 'disorganization' is much more common than the verb 'disorganize'—we often name problems more than we name the actions causing them, showing how nouns dominate abstract thinking.
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