1 [uncountable and countable]
the feeling of being annoyed, upset, or impatient, because you cannot control or change a situation, or achieve something:
People often feel a sense of frustration that they are not being promoted quickly enough.
I was practically screaming with frustration.
In spite of his frustrations, he fell in love with the country.
the fact of being prevented from achieving what you are trying to achieve
The frustration of his ambitions made him a bitter man.