Meaning of frustration

frus•tra•tion

1. act of frustrating; state of being frustrated: the frustration of the president's efforts.
2. an instance of being frustrated: to experience a series of frustrations before completing a project.
3. something that frustrates, as an unresolved problem.
4. a feeling of dissatisfaction, often accompanied by anxiety or depression, resulting from unfulfilled needs or unresolved problems.