1. An aim, goal, or intention that cannot be achieved or accomplished; something that is beyond the realm of possibility
Climbing Mount Everest without any equipment seemed like an impossible purpose.
Escalar o Monte Everest sem nenhum equipamento parecia um propósito impossível.
2. A futile or hopeless objective; an endeavor deemed unachievable from the start
His propósito impossível was to become a professional athlete at the age of 80.
Seu propósito impossível era se tornar um atleta profissional aos 80 anos.