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Pronunciation: ob-sesh'un

Definition: A recurrent and persistent idea, thought, or impulse to carry out an act that is ego dystonic, that is experienced as senseless or repugnant, and that the person cannot voluntarily suppress.

[L. obsideo, pp. -sessus, to besiege, fr. sedeo, to sit]

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© Copyright 2018 Wolters Kluwer. All Rights Reserved. Review date: Sep 19, 2016.