Meaning of prone

prone

1. having a natural inclination or tendency to something; disposed; liable: to be prone to anger.
2. having the front or ventral part downward; lying face downward.
3. lying flat; prostrate.
4. having a downward direction or slope.
5. having the palm downward, as the hand.

prone

1. a sermon or a brief hortatory introduction to a sermon, usually delivered at a service at which the Eucharist is celebrated.