To set free; release from restraint or bondage; deliver: as, to liberate a slave or a prisoner; to liberate the mind from the shackles of prejudice.To disengage; separate from something else: as, to liberate a gas from a solid.n. In old English law, a writ issued out of Chancery for the payment of pensions and similar royal allowances; also, a writ issued to the sheriff for the delivery of land and goods taken upon forfeits of recognizance.