# brainchild

/ˈbɹeɪnˌtʃaɪɫd/ (US) · /bɹˈeɪntʃaɪld/ (UK) · CEFR B2 · Noun

Source: https://englishreference.com/word/brainchild
Updated: 2026-05-27

## Definition

an idea or a project that someone has created or thought of. It is often used to describe something that took a lot of time and effort to make.

For teachers: an idea, invention, or project that has been conceived or created by a specific person. Often carries a slightly informal or affectionate tone when referring to a complex or ambitious undertaking.

## Examples

- The new app is the brainchild of a small team of students.
- The community garden was the brainchild of a local teacher who wanted to bring people together.
- While the initial concept was a simple sketch, the final skyscraper proved to be the brainchild of an architect whose vision had been shaped by years of studying urban density.

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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.