GNU Collaborative International Dictionary of English

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  1.       

    Monomania , n. [Mono- + mania.] Derangement of the mind in regard of a single subject only; also, such a concentration of interest upon one particular subject or train of ideas to show mental derangement.
    1913 Webster
    Syn. -- Insanity; madness; alienation; aberration; derangement; mania. See Insanity.
    1913 Webster

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