frus·tra·tion 
/ˌfrʌˈstreɪʃən/ noun
plural frus·tra·tions /ˌfrʌˈstreɪʃən/ noun 1 a [noncount] : a feeling of anger or annoyance caused by being unable to do something : the state of being frustrated
▪ He shook his head in frustration. ▪ These bureaucratic delays have been causing us a lot of frustration.
b [count] : something that causes feelings of anger and annoyance : something that frustrates someone
▪ These delays have proven to be a major frustration. ▪ We've been experiencing a lot of frustrations. 2 [noncount] : the act of preventing the success of something : the act of frustrating something
▪ He was angry about the frustration of his plans.
▪ He shook his head in frustration. ▪ These bureaucratic delays have been causing us a lot of frustration.
b [count] : something that causes feelings of anger and annoyance : something that frustrates someone
▪ These delays have proven to be a major frustration. ▪ We've been experiencing a lot of frustrations.
▪ He was angry about the frustration of his plans.
