External Dependency
Noun · Hacker Culture
Definitions
A dependency outside the direct control of a team, such as another vendor, team, service, regulator, or partner. In planning culture, external dependencies are often where schedules become optimistic and then unravel.
In plain English: A dependency controlled by someone outside your immediate team.
Example: "The timeline slipped not because the team worked slowly, but because the biggest milestone depended on an external dependency that kept changing its API contract."