unpurpose noun 1verb 1forms 3 noun1 •(rare) Lack or absence of purpose; purposelessness.Countless demolitions and re-edifications; a thorough unpurpose, so it seems, a thorough futility, that appears to be the truth and what could be more afflicting to an historian? — 1954 verb1 •To deprive of a purpose; to remove or derail the purpose of.O, Goodness ! help me to unplan that plan, and to unpurpose that purpose ! — 1854 formsunpurposed · unpurposing · unpurposes