Skip to Content
Medical Term:


Pronunciation: ob-sesh'un


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]

© Copyright 2017 Wolters Kluwer. All Rights Reserved. Review Date: Sep 19, 2016.