Definition of frustration noun from the Oxford Advanced Learner's Dictionary
frustration
noun
frʌˈstreɪʃn frʌˈstreɪʃn
1[uncountable]the feeling of being frustratedDave thumped the table in frustration.She couldn't stand the frustration of not being able to help.sexual frustration2[countable, usually plural]something that causes you to feel frustratedEvery job has its difficulties and frustrations.Inevitably she took out her frustrations on the children.3[uncountable]frustration of something (formal) the fact that something is preventing something/somebody from succeedingthe frustration of all his ambitions