(A) civ. law. The formula put upon an act; a register; a commercial book, in order to approve of it and authenticate it. (B) The stamped placed in the passport of foreigners by a U.S. Consulate Official in their foreign country that allows the holder of the visa to enter the United States, designated as either an immigrant visa or nonimmigrant visa. An official Indorsement npon a document, passport commercial book, etc. to certify that it has been examined and found correct or in due form.