: feeling, showing, or characterized by frustration: such as
a
: feeling discouragement, anger, and annoyance because of unresolved problems or unfulfilled goals, desires, or needs
In fact Harry thought his behavior had been very good considering how frustrated and angry he felt at being stuck in Privet Drive this long … J. K. Rowling
b
: having an ambition that has not been realized
a frustrated actor [=a person who wants to be an actor but has not succeeded in becoming one]
Over the past decade, however, advances in digital printing technologies have brought the costs of publication down and paved the way for thousands of frustrated writers to get their work into print. Robert K. J. Killheffer