# erratically

/ɛˈɹætɪkɫi/ (US) · /ɛɹˈætɪkli/ (UK) · CEFR B2 · Adverb

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

## Definition

in a way that is uneven and hard to predict, changing a lot from moment to moment. You use this when something does not follow a steady pattern.

For teachers: in an irregular and unpredictable way, without a steady pattern or rhythm. Typically describes movement, behaviour, or performance that changes sharply from moment to moment.

## Examples

- The bus moves erratically through the heavy traffic.
- The old washing machine shakes erratically during the spin cycle and walks across the floor.
- The lighthouse beam sweeps erratically in the storm, now lost in rain, now flashing across the breaking waves.

## Synonyms

irregularly, unevenly, randomly, unpredictably, inconsistently

## Antonyms

steadily, regularly, consistently, predictably

## Usage notes

- Typically placed after the verb it modifies or at the end of the clause.

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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.