Final answer:
The minus icon signifies that 'previous' deployments have been executed towards that environment in software development and DevOps contexts.
Step-by-step explanation:
The minus icon typically represents that previous deployments have been executed towards that environment. In this context, 'previous' refers to deployments that have occurred before the current state or the most recent deployment. This icon is often used in software development and DevOps to signify the historical deployment actions that have taken place, differentiating them from future or planned deployments.