devotion in WordNet English dictionary

1. religious zeal; the willingness to serve God
   idolatry  devotion  veneration  cultism 
   
2. feelings of ardent love
   "their devotion to each other was beautiful"
   devotion  devotedness 
   
3. (usually plural) religious observance or prayers (usually spoken silently)
   "he returned to his devotions"
   devotion 
   
4. commitment to some purpose
   "the devotion of his time and wealth to science"
   devotion