dominant idea

idea (i-de´ah) a mental impression or conception.

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autochthonous idea  a persistent idea originating within the mind but seeming to have come from an outside source and often therefore felt to be of malevolent origin.

dominant idea  one that controls or colors every action and thought.

fixed idea  a persistent morbid impression or belief that cannot be changed by reason.

overvalued idea  a false or exaggerated belief sustained beyond reason or logic but with less rigidity than a delusion, also often being less patently unbelievable.

idea of reference  the incorrect idea that words and actions of others refer to oneself or the projection of the causes of one's own imaginary difficulties upon someone else.

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dominant idea

n.

An idea that governs all the actions and thoughts of the individual.