You are exhausted in a way sleep does not touch, cynical about things you used to care about, and somewhere in the background a question has started circling: is this burnout, or is this depression. The question matters more than it might seem, because the two call for different responses, and because the answer is allowed to be both. This piece will not diagnose you. It will lay the two side by side honestly, so you can see what you are looking at and decide what to do next.
Start with what burnout officially is. The World Health Organization classifies burnout in the ICD-11 not as a medical condition but as an occupational phenomenon, defined by three dimensions: exhaustion, mental distance or cynicism toward one's job, and reduced professional efficacy. The definition's most important word is occupational. Burnout, in its strict sense, is tied to a context, chronic workplace stress that was not successfully managed. It points at a situation. Depression points at a person's whole life.
That difference in scope is the most useful first lens. Classic burnout is domain-shaped. The exhaustion and cynicism cluster around work, and capacity for joy elsewhere, weekends, people, hobbies, is reduced but not gone. Depression is pervasive. It does not check your calendar. The flatness covers work and weekends alike, the hobby and the vacation and the people you love, because the dimmer is internal, not situational.
A second lens is what the inner voice says. Burnout's voice tends to be about the situation: this job is impossible, these demands are absurd, I cannot keep doing this. Depression's voice turns on the self: I am worthless, I am a burden, nothing I do matters. Self-esteem in early and mid burnout is often bruised but intact. Pervasive worthlessness and guilt are depression's territory, and their presence shifts the question from workload to health.
A third lens is response to removal. Take a genuinely burned out person away from the stressor, a real vacation, a leave, a job change, and something eventually responds, slowly, but the needle moves. Depression typically does not resolve by subtraction. The beach arrives and the gray comes too. If you have already changed the circumstances and nothing inside changed with them, that is meaningful information.
Now the honest complication: the borders blur, and the research community itself debates where one ends and the other begins. Severe burnout can look clinically identical to depression, and chronic unmanaged burnout is a documented risk factor for developing it. The two can coexist. So the lenses above are orientation, not a verdict, and there is a threshold past which the distinction stops being yours to settle alone: persistent hopelessness, worthlessness, loss of interest in everything, significant sleep and appetite changes, or any thoughts of not wanting to be here. At that line, the correct move is a doctor or therapist, promptly, regardless of which label fits. Depression is treatable, and clinicians are precisely the people equipped to untangle it from burnout.
If what you see is the work-shaped version, the burnout playbook applies: reduce the actual load, not just your attitude toward it, recover on a timeline longer than you want, and treat the situation as the patient. If what you see crosses into the pervasive version, the bravest practical step is an appointment. Either way, the exhaustion is real, it has a shape, and naming the shape correctly is the first thing that has gone right in a while.