1. A non-depressed, reasonably positive mood. It is represented by a sort of contentness in feeling neutral.
2. A condition in which a person feels more "at home" under the influence of psychadelics than they do sober; a person with this form of euthymia does not hallucinate as most people do while under the influence of hallucinogens, but rather just feels "alive" in a way they don't feel while sober.
1. The Buddhist monk was in a constant state of euthymia.
2. "I don't see like, pink elephants and stuff. I have euthymia."