MATTER
  1. a group of particles of energy located in a relatively stable relationship to each other. (9ACC-24, 5501C14)
  2. thought, effort and emotion all in one place at the same time. (PDC 62)
  3. a particle with no space to go anyplace. (PDC 16)
  4. it is evidently a very solid thought which is chaotic enough in its arrangement of attention units that you can't do too much about it. (5206CM23B)


Technical Dictionary