What is the meaning of attention?

noun

• The process whereby a person concentrates on some features of the environment to the (relative) exclusion of others.
  • synonyms: attending
• The work of providing treatment for or attending to someone or something.
  • usage: "no medical care was required"; "the old car needs constant attention"
  • synonyms: care, aid, tending
• A general interest that leads people to want to know more.
  • usage: "She was the center of attention"
• A courteous act indicating affection.
  • usage: "she tried to win his heart with her many attentions"
• The faculty or power of mental concentration.
  • usage: "keeping track of all the details requires your complete attention"
• A motionless erect stance with arms at the sides and feet together; assumed by military personnel during drill or review.
  • usage: "the troops stood at attention"