Definition 33.10.1. Let $X$ be a scheme over the field $k$.
Let $x \in X$. We say $X$ is geometrically normal at $x$ if for every field extension $k'/k$ and every $x' \in X_{k'}$ lying over $x$ the local ring $\mathcal{O}_{X_{k'}, x'}$ is normal.
We say $X$ is geometrically normal over $k$ if $X$ is geometrically normal at every $x \in X$.
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