In practice. In ancient usage, to testify as a witness; to give evidenceunder oath. In modern usage. To make a deposition ; to give evidence in the shape of a deposition; to make statements which are written down and sworn to; to give testimonywhich is reduced to writing by a duly-qualified officer and sworn to by the deponent.To deprive an individual of a public employment or office against his will. Wolffius,Inst.