1. passive transport transport of a substance across a cell membrane by diffusion
  2. air transportation transportation by air
  3. active transport transport of a substance (as a protein or drug) across a cell membrane against the concentration gradient; requires an expenditure of energy
  4. private property movable property (as distinguished from real estate)
  5. private instructor a person who gives private instruction
  6. private practice the practice of a profession independently and not as an employee
  7. private corporation a corporation owned by a few people
  8. transportation the act of moving something from one location to another
  9. public transport conveyance for passengers or mail or freight
  10. private-enterprise subscribing to capitalistic competition
  11. private enterprise an economy that relies chiefly on market forces to allocate goods and resources and to determine prices
  12. Department of Transportation the United States federal department that institutes and coordinates national transportation programs; created in 1966
  13. car transporter a long truck for carrying motor vehicles
  14. troop transport any land or sea or air vehicle designed to carry troops
  15. transport ship a ship for carrying soldiers or military equipment
  16. air transport transportation by air
  17. transparent able to be seen through with clarity
  18. Transportation the United States federal department that institutes and coordinates national transportation programs; created in 1966
  19. transportable capable of being moved or conveyed from one place to another
  20. tape transport a mechanism that transports magnetic tape across the read/write heads of a tape playback/recorder