adj bending forward; inclined; not erect.
2. prone ·adj headlong; running downward or headlong.
3. prone ·adj prostrate; flat; ·esp., lying with the face down;
opposed to supine.
4. prone ·adj sloping, with reference to a line or surface; declivous; inclined; not level.
5. prone ·adj inclined; propense; disposed;
applied to the mind or affections, usually in an ill sense. followed by to.