# rectify

/ˈɹɛktəˌfaɪ/ (US) · /ɹˈɛktɪfˌaɪ/ (UK)

Source: https://englishreference.com/word/rectify
Updated: 2026-08-27

## Senses

### 1. to correct a mistake

verb · CEFR B2 · Formal

to fix a mistake or a problem so that things are correct again.

For teachers: to remedy or set right an undesirable situation, error, or defect.

- The company promised to rectify the error on my bill immediately.
- The management team met urgently to discuss how to rectify the damage caused by the recent data breach.

Usage: Transitive; always takes a direct object representing the problem or error.

### 2. electronics

verb · CEFR C1 · Technical

to change an electric current from one that flows back and forth to one that flows in one direction.

For teachers: to convert alternating current (AC) into direct current (DC).

- A diode is used to rectify the current in the power supply.
- The circuit requires a bridge rectifier to efficiently rectify the high-voltage AC input into a stable DC output for the sensitive components.

Usage: Used primarily in electrical engineering contexts.

### 3. chemistry

verb · CEFR C1 · Technical

to make a liquid pure by heating it and collecting the vapour.

For teachers: to purify or refine a substance, especially a spirit or liquid, by repeated distillation.

- The alcohol must be rectified several times to reach the required purity.
- The laboratory technician was tasked to rectify the crude extract to ensure no volatile impurities remained in the final solution.

Usage: Often used in the production of spirits or industrial chemicals.

### 4. mathematics

verb · CEFR C2 · Technical · Formal

to find the exact length of a curved line.

For teachers: to determine the length of a curve between two specific points.

- The students learned how to rectify a curve using calculus.
- The professor demonstrated the integration techniques required to rectify the arc length of a complex parabola.

Teaching tip: This sense is highly specialized and rarely encountered outside of advanced mathematics.

## Examples

- The company promised to rectify the error immediately.
- After discovering the billing mistake, the manager worked quickly to rectify the situation and refund the customer.
- The new legislation was introduced specifically to rectify the systemic inequalities that had persisted in the housing market for decades, though critics argued the changes were merely cosmetic.

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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.