an idea or plan produced by creative thought; invention
WordReference Random House Learner's Dictionary of American English © 2025
brain•child /ˈbreɪnˌtʃaɪld/USA pronunciation
n. [countable], pl. -chil•dren.
WordReference Random House Unabridged Dictionary of American English © 2025- a product of one's thinking or planning:The school play was his brainchild, not mine.
brain•child
(brān′chīld′),USA pronunciation n., pl. -chil•dren.
- a product of one's creative work or thought.
- brain + child 1880–85
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