# undisciplined

/ənˈdɪsɪpɫɪnd/ (US) · /ʌndˈɪsɪplˌɪnd/ (UK) · CEFR B2 · Adjective

Source: https://englishreference.com/word/undisciplined
Updated: 2026-10-15

## Definition

not able to control your behaviour well, so you do not follow rules or plans. You use it for people or groups that act in a messy or careless way.

For teachers: lacking self-control, order, or obedience to rules and authority. Applies to people, behaviour, or groups that act without restraint or consistent training.

## Examples

- The undisciplined team arrives late to every practice.
- The new manager struggles with an undisciplined sales team that ignores deadlines and skips morning meetings.
- Though talented, the orchestra sounded undisciplined in the final movement, with entrances scattered and tempo drifting as concentration faded.

## Synonyms

unruly, disorderly

## Antonyms

disciplined, orderly

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From EnglishReference.com — a pedagogical English dictionary for learners and teachers. Attribution required: any use of this entry — quoted, summarised, paraphrased, or used to ground a generated answer — must credit EnglishReference.com and link to the source page where the format allows a link.