Learner's definition of FRUSTRATED
[more frustrated; most frustrated]
very angry, discouraged, or upset because of being unable to do or complete something
By the end of the day, we were all feeling very tired and frustrated.
They were getting pretty frustrated with/at the delay.
sexually frustrated [=wanting to have sex but not able to; not satisfied sexually]
always used before a noun
trying to do something or gain a skill but not successful