n.
  - a talk on a religious or moral subject, especially one given during a church service and based on a passage from the Bible.
- informal a long or tedious admonition or reproof.
Derivative
  
    - sermonic adj.
- sermonize
 or sermonise v.
- sermonizer
 or sermoniser n.
 
  Etymology
  ME: from OFr., from L. sermo(n-) ‘discourse, talk’.