# incidentally

/ˌɪnsɪˈdɛntəɫi/ (US) · /ˌɪnsɪdˈɛntəli/ (UK)

Source: https://englishreference.com/word/incidentally
Updated: 2026-06-20

## Senses

### 1. by the way

adverb · CEFR B2

you use this when you want to add a quick piece of information that is not the main topic.

For teachers: used as a sentence connector to introduce a remark that is not directly related to the main subject of discussion.

- We had a great time at the party — incidentally, did you see what Sarah was wearing?
- The report provides a comprehensive overview of the fiscal year; incidentally, it also highlights several areas where the department could reduce waste.

Usage: Usually placed at the beginning of a sentence or clause to signal a change in topic.

### 2. by chance

adverb · CEFR C1 · Formal

happening as a small part of something else, or by accident.

For teachers: occurring as a minor consequence or accompaniment to a primary activity or event.

- The two scientists discovered the new chemical incidentally while they were looking for something else.
- The data was collected incidentally during the primary study, yet it proved to be the most significant finding of the entire research project.

Usage: Often follows the verb it modifies.

## Examples

- Incidentally, have you seen my keys anywhere?
- We should finish the report by Friday; incidentally, the manager wants to see the first draft tomorrow.
- The report highlights several structural flaws in the bridge; incidentally, these same issues were raised by the original engineering team nearly a decade ago but were never addressed.

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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.