CONSERVATOR. A preserver, a protector. 2. Before the institution of the office of justices of the peace in England, the public order was maintained by officers who bore the name of conservators of the peace. All judges, justices, sheriffs and constables, are conservators of the peace, and are bound, ex officio, to be aiding and assisting in preserving older. 3. In Connecticut, this term is applied to designate a guardian who has the care of the estate of an idiot. 5 Conn. R. 280.