# whereby

/hwɛɹˈbaɪ/ (US) · /wˈeəbaɪ/ (UK)

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

## Senses

### 1. by which / through which

conjunction · CEFR C1 · Formal · Academic

you use this to show the method or system that makes something possible.

For teachers: introduces a relative clause indicating the means or mechanism by which the preceding noun functions or is achieved.

- The school created a new system whereby students can choose their own projects.
- The government has implemented a new regulatory framework whereby local authorities are granted greater autonomy over their infrastructure budgets.

Usage: Usually follows a noun like 'system', 'process', 'arrangement', or 'mechanism'.

Teaching tip: This is a high-level connective common in academic writing and legal documents; students should use it to replace 'by which' for a more formal tone.

### 2. how / by what means

adverb · CEFR C2 · Archaic · Literary

an old way of asking 'how' or 'by what means' something happened.

For teachers: an interrogative adverb used to inquire about the means or manner of an action.

- Whereby shall we know that this story is true?
- Whereby shall the witness prove his presence at the scene, given the lack of physical evidence?

Usage: Used as an interrogative at the start of a question.

Teaching tip: This sense is rarely encountered outside of historical literature or religious texts like the King James Bible.

## Examples

- They signed a deal whereby both companies share the profits.
- The school introduced a new policy whereby students can earn extra credit for community service projects.
- The treaty established a formal mechanism whereby territorial disputes could be resolved through international arbitration rather than military intervention.

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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.