|any mental illness not primarily of organic origin in which the patient ceases to function properly, often accompanied by severely impaired concentration, anxiety, insomnia, and lack of self-esteem; used esp of episodes of depression|
|the offspring of a zebra and a donkey.|
|an extraordinary or unusual thing, person, or event; an exceptional example or instance.|
nervous breakdown n.
A severe or incapacitating emotional disorder, especially when occurring suddenly and marked by depression.