回

huí
  1. to circle
  2. to go back
  3. to turn around
  4. to answer
  5. to return
  6. to revolve
  7. Hui ethnic group (Chinese Muslims)
  8. time
  9. classifier for acts of a play
  10. section or chapter (of a classic book)

CEDICT

Classifier for

事 shì
  1. matter
  2. thing
  3. item
  4. work
  5. affair

classifiers: 件, 樁, 回

Homographs

回 huí
  1. to curve
  2. to return
  3. to revolve
回 huí variant of 回 huí