Here are some examples:
* Estado de salud: State of health
* Estado de ánimo: Mood
* Estado de emergencia: State of emergency
* Estado de conservación: State of preservation
* Estado de la economía: State of the economy
It can also be used figuratively to describe the state of a person's mind or emotions.
For example:
* Estoy en un estado de confusión. (I am in a state of confusion.)
* Se encuentra en un estado de euforia. (He is in a state of euphoria.)
Note: The word "estado" can also refer to a "state" as in a country, but in that case, it would be followed by the name of the state, like "estado de California."