1. police investigation the investigation of criminal activities
  2. personification attributing human characteristics to abstract ideas
  3. investigation an inquiry into unfamiliar or questionable activities
  4. police station a station that serves as headquarters for police in a particular district; serves as a place from which policemen are dispatched and to which arrested persons are brought
  5. sophistication the quality or character of being intellectually worldly
  6. prognostication a sign of something about to happen
  7. disinfestation the activity of getting rid of vermin
  8. placentation the formation of the placenta in the uterus
  9. manifestation a clear appearance
  10. private investigator someone who can be employed as a detective to collect information
  11. instigation deliberate and intentional triggering
  12. Polish notation a parenthesis-free notation for forming mathematical expressions in which each operator precedes its operands
  13. benediction a blessing or ceremonial prayer invoking divine protection
  14. infestation the state of being invaded or overrun by parasites
  15. litigation a legal proceeding in a court
  16. dictionary a reference book containing an alphabetical list of words
  17. police action a local military action without declaration of war
  18. business deduction tax write-off for expenses of doing business
  19. plastination a process involving fixation and dehydration and forced impregnation and hardening of biological tissues; water and lipids are replaced by curable polymers (silicone or epoxy or polyester) that are subsequently hardened
  20. principal investigator the scientist in charge of an experiment or research project