What best defines depression?

Depression is best defined as a prolonged feeling of helplessness, hopelessness, and sadness because it encapsulates the persistent nature of the condition. These feelings are often accompanied by a lack of energy, interest in daily activities, and difficulties in functioning in various areas of life, such as work and relationships. This definition emphasizes that depression is not just a fleeting emotion or a response to specific events, but a serious mental health disorder that can last for weeks, months, or even longer.

In contrast, temporary mood swings or emotional reactions to stress suggest that the feelings are short-term and often situational, which does not align with the chronic aspect of depression. A state of unfulfilled happiness or contentment might point to dissatisfaction but does not capture the depth of despair and dysfunction experienced in depression. Thus, the correct response highlights the seriousness and duration of the feelings associated with depression, distinguishing it from more transient emotional states.