Telecom Customer needs an export of all Analytics Segments and Definitions. Currently there is not a way to do this from the Analytics UI.
Feature Request. Export Analytics Segments and Definitions from UI.
The Adobe Analytics API can be used to import and export segments: GitHub - AdobeDocs/analytics-1.4-apis: Documentation and helpful resources for calling the Analytics...
If you go to the Swagger UI documentation on that page, you can see the different requests. I would use Segments.Get and add "definition" as one of the fields displayed.