For which of these reasons does the word deviate mean depart from an established route?

The word "deviate" doesn't specifically mean "depart from an established route." While it can be used in that context, its core meaning is broader than just physical routes.

Here's a breakdown of the word's meaning and how it relates to your question:

Deviate:

* Meaning: To move away from an established course, standard, or norm.

* Context: Can be used for physical paths, but also for abstract concepts like standards, beliefs, or behavior.

Examples:

* Physical route: "The driver deviated from the highway and took a scenic detour."

* Standard: "The company's performance deviated from its usual standards."

* Belief: "His political views deviated significantly from the party's platform."

Therefore, the word "deviate" doesn't exclusively refer to departing from a physical route. It's a broader concept that encompasses any movement away from a set path, whether physical, mental, or conceptual.