Source : Webster's Revised Unabridged Dictionary (1913)

Attention \At*ten"tion\, n. [L. attentio: cf. F. attention.]
   1. The act or state of attending or heeding; the application
      of the mind to any object of sense, representation, or
      thought; notice; exclusive or special consideration;
      earnest consideration, thought, or regard; obedient or
      affectionate heed; the supposed power or faculty of
      attending.

Source : WordNet®

attention
     n 1: the process whereby a person concentrates on some features
          of the environment to the (relative) exclusion of others
          [syn: {attending}] [ant: {inattention}]
     2: the work of caring for or attending to someone or something;
        "no medical care was required"; "the old car needed
        constant attention" [syn: {care}, {aid}, {tending}]
     3: a general interest that leads people to want to know more;
        "She was the center of attention"
     4: a courteous act indicating affection; "she tried to win his
        heart with her many attentions"
     5: the faculty or power of mental concentration; "keeping track
        of all the details requires your complete attention"
     6: a motionless erect stance with arms at the sides and feet
        together; assumed by military personnel during drill or
        review; "the troops stood at attention"