unpossess verb2 •(rare) To be without, or to resign, possession of.This is a farce. Since when did I receive the gun (which is possessing it) and then unpossess it, and, then possess it again (all from 1984 to 1985) . — 1995 •To free from an obsession that has taken hold of (someone)The hold that is given over I unpossess, so hangeth now in balance Of war my peace, reward of all my pain, At Mountzon thus I restless rest in Spain. — 1879 formsunpossessed · unpossessing · unpossesses