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Jan 20, 2019 at 18:27 comment added YCor To be complete: a local metric on a topological space is defined as the data of an open covering $(U_i)$, a metric $d_i$ on each $U_i$, such that the identity map $(U_i\cap U_j,d_i)\to (U_i\cap U_j,d_j)$ is Lipschitz for each $i$. There is a natural equivalence of local metrics (local bilipschitz equivalence). A locally metric space is defined there as a topological space endowed with an equivalence class of local metrics. Of course it's important to emphasize "local" since many people are interested in global or even large-scale aspects of Lipschitz geometry.
Jan 20, 2019 at 18:21 comment added YCor Link to paper: acadsci.fi/mathematica/Vol03/vol03pp085-122.pdf
Jan 20, 2019 at 13:19 vote accept Benoit Jubin
Jan 20, 2019 at 13:18 history answered Benoit Jubin CC BY-SA 4.0