noun. 1. introduced by Swiss psychiatrist Eugen Bleuler, the parallel existence of confounding emotions and outlooks, such as sweetness and bitterness or goodwill and belligerency, in direction of the exact same individual, item, affair, or circumstance. Disagreeing emotions are frequently intense in direction of moms and dads, because they're elements of constraint and fondness. 2. doubt or being unsure concerning a treatment.