British spelling: in a state of disorganization; lacking method, structure, or orderly arrangement; chaotic and confused.
Past participle of disorganise (British spelling). The word combines dis- (reversal) + organized to describe something that has lost its structure.
Interestingly, 'disorganised' is far more common than the verb 'disorganise'—we describe the state (adjective) way more than we describe the action (verb) in everyday speech.
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