What is the meaning of musing?

noun

• A calm, lengthy, intent consideration.
  • synonyms: contemplation, reflection, reflexion, rumination, thoughtfulness

verb

• Reflect deeply on a subject.
  • usage: "I mulled over the events of the afternoon"; "philosophers have speculated on the question of God for thousands of years"; "The scientist must stop to observe and start to excogitate"
  • synonyms: chew over, think over, meditate, ponder, excogitate, contemplate, muse, reflect, mull, mull over, ruminate, speculate

adjective

• Deeply or seriously thoughtful.
  • usage: "Byron lives on not only in his poetry, but also in his creation of the 'Byronic hero' - the persona of a brooding melancholy young man";
  • synonyms: brooding, broody, contemplative, meditative, pensive, pondering, reflective, ruminative