Definition of neurasthenia
: a psychological disorder marked especially by easy fatigability and often by lack of motivation, feelings of inadequacy, and psychosomatic symptoms — compare chronic fatigue syndrome
Origin of neurasthenia
First Known Use: circa 1856
Medical Definition of neurasthenia
: a condition that is characterized especially by physical and mental exhaustion usually with accompanying symptoms (as headaches, insomnia, and irritability), is believed to result from psychological factors (as depression or emotional stress or conflict), and is sometimes considered similar to or identical with chronic fatigue syndrome
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