disorganised

disorganised — adjective

1. describes a situation, event, or system that lacks a clear structure because thi

1.adjectiveB2
Definition

describes a situation, event, or system that lacks a clear structure because things have not been arranged or planned carefully

Example

The conference was so disorganised that several speakers missed their scheduled slots.

so + adj + that-clause pattern

Ayesha found the office filing system completely disorganised, with papers stacked on every surface.

Common collocations
  • disorganised event
  • disorganised system
  • disorganised meeting
  • disorganised plan
  • completely disorganised
  • hopelessly disorganised
Synonyms
  • chaotic

    stronger than disorganised — suggests wild confusion and lack of control

  • messy

    more informal; can refer to physical untidiness or a poorly-managed situation

  • haphazard

    emphasises randomness and lack of system or care

Antonyms
  • organised

    the direct opposite — well-planned and orderly

  • systematic

    suggests a careful, methodical approach

Grammar Patterns

be + disorganised

so + disorganised + that-clause

Usage Note

Commonly describes events (meetings, conferences), systems (filing, transport), or plans (evacuation, schedule). Intensifying adverbs such as 'completely', 'totally', or 'hopelessly' are frequent with this sense.

Common Mistakes

The event was unorganised from the start.
The event was disorganised from the start.
'Unorganised' means 'not yet organised' (a neutral state), while 'disorganised' means 'lacking order' (a negative state). British English prefers 'disorganised' for confusion or poor planning.

2. describes a person who is not able to plan things well or keep their belongings,

2.adjectiveB2
Definition

describes a person who is not able to plan things well or keep their belongings, tasks, or time in order

Example

Felipe is too disorganised to manage his own work schedule without reminders.

too + adj + to-infinitive pattern

Élise's disorganised study habits made it hard for her to finish assignments on time.

Common collocations
  • disorganised person
  • disorganised student
  • disorganised habits
  • hopelessly disorganised
  • chronically disorganised
Synonyms
  • messy

    more informal and often refers to physical untidiness rather than poor planning

  • scatterbrained

    informal; suggests being forgetful or unable to concentrate on details

  • slapdash

    describes someone who does things too quickly and carelessly

Antonyms
  • organised

    able to plan things well and keep things tidy

  • methodical

    doing things in a careful, systematic way

Grammar Patterns

be + disorganised

too + disorganised + to-infinitive

Usage Note

Describes a person's habitual character or general approach to life, not a temporary mood. To talk about a single messy day, use an expression like 'I feel a bit all over the place today' rather than 'I am disorganised today'.

Common Mistakes

She is a disorganised.
She is disorganised.
'Disorganised' is an adjective; it does not take an article when used alone after 'be'. Use 'a disorganised person' if a noun is needed.

Word family

Synonym discussion

Sense: adjective/1

Disorganised and chaotic both describe a lack of order, but chaotic suggests a more extreme, uncontrolled confusion — for example, a room after a party is chaotic, while the same room before guests arrive may simply be disorganised. Messy is more informal and can refer to physical untidiness or a poorly-managed situation; it overlaps with both senses of disorganised. Haphazard emphasises a lack of care or systematic method, as if things were thrown together at random. Disordered is a more formal, clinical term often used in psychology or medicine. Compare: 'the filing system was disorganised' (not properly arranged) versus 'the evacuation was chaotic' (complete panic and confusion).

chaoticmessy ↗haphazarddisordered

Common collocations

Adverbs

Etymology

LatinFrenchEnglish

Formed from the prefix 'dis-' (meaning 'not' or 'reversal of') plus 'organised', which came into English from French 'organiser', ultimately from Latin 'organum' meaning 'tool' or 'instrument'. The word first appeared in the late 18th century, originally used to describe a system or society that had lost its structure. The American spelling 'disorganized' uses a 'z' instead of an 's'.