The Stacks project

Definition 72.11.1. Let $k$ be a field. Let $X$ be an algebraic space over $k$.

1. Let $x \in |X|$ be a point. We say $X$ is geometrically reduced at $x$ if $\mathcal{O}_{X, \overline{x}}$ is geometrically reduced over $k$.

2. We say $X$ is geometrically reduced over $k$ if $X$ is geometrically reduced at every point of $X$.