What does apparitor mean?
The definition of apparitor
Ap*par”i*tor, n.
Etym: [L., fr. apparere. See Appear.]

1 Formerly, an officer who attended magistrates and judges to execute their orders. Before any of his apparitors could execute the sentence, he was himself summoned away by a sterner apparitor to the other world. De Quincey.
2 (Law)
A messenger or officer who serves the process of an ecclesiastical court. Bouvier.