* A worker or employee in any field: This included artisans, shopkeepers, and even professional people like lawyers or doctors, if they were working for someone else.
* Someone who is obliged to serve another, especially a lord or master: This could refer to vassals, tenants, or anyone bound to a superior by a social contract or feudal obligation.
* Someone who is devoted to a cause or ideal: This might refer to someone who was considered to be "serving" a particular religion, political ideology, or even a specific person they admired.
Therefore, the meaning of "servant" was more fluid and encompassing in older English. Today, we tend to use "servant" primarily for domestic workers, while other terms like "employee," "worker," or "follower" are used for other contexts.