What does "caitiff" mean?

Additional senses

1. 2.A captive; a prisoner. [Obs.] Avarice doth tyrannize over her caitiff and slave. Holland.
2. 3.A wretched or unfortunate man. [Obs.] Chaucer.
3. 4.A mean, despicable person; one whose character meanness and wickedness meet. Note: The deep-felt conviction of men that slavery breaks down the moral character . . . speaks out with . . . distinctness in the change of meaning which caitiff has undergone signifying as it now does, one of a base, abject disposition, while there was a time when it had nothing of this in it. Trench.