1. apparent motion an optical illusion of motion produced by viewing a rapid succession of still pictures of a moving object
  2. apparent movement an optical illusion of motion produced by viewing a rapid succession of still pictures of a moving object
  3. apparent horizon the line at which the sky and Earth appear to meet
  4. apparentness the property of being apparent
  5. apprentice someone who works for an expert to learn a trade
  6. apprehension fearful expectation or anticipation
  7. approximation a rough calculation of quantity or degree or worth
  8. apparition a ghostly appearing figure
  9. orientation the act of determining one's position
  10. approbation official acceptance or agreement
  11. appreciation understanding of the nature or meaning of something
  12. intimation a slight suggestion or vague understanding
  13. apprenticeship the position of one working for an expert to learn a trade
  14. apparent clearly revealed to the mind or the senses or judgment
  15. overestimation an appraisal that is too high
  16. apparently seemingly; as far as one can tell
  17. onward motion the act of moving forward (as toward a goal)
  18. apartment a suite of rooms of a house divided into separate dwellings
  19. aberration a state or condition markedly different from the norm
  20. operations financial transactions at a brokerage

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