What term describes a physical/behavioral state of a system?

The term that accurately describes a physical or behavioral state of a system is referred to as "Condition." This term encompasses various aspects of a system’s status, including its physical attributes as well as behavioral characteristics, which could impact its performance or functionality in a given context.

"Effect" typically refers to a change that results from a specific action or event, rather than describing the current state of the system itself. "Outcome" usually signifies the final result or consequence of a series of actions or events, which makes it less suitable for describing the ongoing state. "Status" can imply a position or condition but is often used in a more situational context rather than thoroughly encompassing the entirety of a system's physical or behavioral attributes in a systematic manner.

Thus, "Condition" is the most encompassing and appropriate term for defining the physical and behavioral aspects of a system.