1. [adj]  wholly absorbed as in thought; "deep in thought"; "that engrossed look or rapt delight"; "the book had her totally engrossed"; "enwrapped in dreams"; "so intent on this fantastic...narrative that she hardly stirred"- Walter de la Mare; "rapt with wonder"; "wrapped in thought"
2. [adj]  deeply moved; "sat completely still, enraptured by the music"; "listened with rapt admiration"; "rapt in reverie"

1. \Rapt\ (r[a^]pt),
   imp. & p. p. of {Rap}, to snatch away.
   

2. \Rapt\, a.
   1. Snatched away; hurried away or along.
            Waters rapt with whirling away.       --Spenser.
   2. Transported with love, admiration, delight, etc.;
      enraptured. ``The rapt musician.'' --Longfellow.
   3. Wholly absorbed or engrossed, as in work or meditation.
      ``Rapt in secret studies.'' --Shak.
   

3. \Rapt\, n. [From F. rapt abduction, rape, L. raptus, fr.
   rapere to seize and carry off, to transport; or fr. E. rapt,
   a. See {Rapt}, a., and {Rapid}.]
   1. An ecstasy; a trance. [Obs.] --Bp. Morton.
   2. Rapidity. [Obs.] --Sir T. Browne.
   

4. \Rapt\, v. i.
   1. To transport or ravish. [Obs.] --Drayton.
   2. To carry away by force. [Obs.] --Daniel.
   

["An Interpreter for a Language for Describing Assemblies", R.J. Popplestone et al, Artif Intell 14:79-107 (1980)].