"The court ruled that Hamas should be included as a terrorist organization," Samir Sabry, one of the lawyers who brought the case against Hamas, told Reuters.
While the January decision against Hamas targeted only the armed wing, Saturday's broader ruling could have greater consequences for the already strained relations between Cairo and Hamas, which rules the Gaza Strip along Egypt's border.
A source close to Hamas' armed wing signaled the group would no longer accept Egypt as a broker between it and Israel after the January decision against Hamas' Qassam Brigades armed wing.
Cairo has for many years played a central role in engineering ceasefires between Israel and Hamas, which dominates the Gaza Strip, including a truce reached between the sides in August that ended a 50-day Gaza war.