What is the meaning of devotion?

noun

• Feelings of ardent love.
  • usage: "their devotion to each other was beautiful"
  • synonyms: devotedness
• Commitment to some purpose.
  • usage: "the devotion of his time and wealth to science"
• Religious zeal; the willingness to serve God.
  • synonyms: idolatry, veneration, cultism
• Usually plural. ( religious observance or prayers (usually spoken silently))
  • usage: "he returned to his devotions"