1. closed book something that baffles understanding and cannot be explained
  2. closed-door not open to the public
  3. closed loop a control system with a feedback loop that is active
  4. closed shop a company that hires only union members
  5. closedown termination of operations
  6. closed-ring having atoms linked by bonds represented in circular or triangular form
  7. casebook a book in which detailed written records of a case are kept and which are a source of information for subsequent work
  8. close down cease to operate or cause to cease operating
  9. close out terminate
  10. closed in blocked against entry
  11. Good Book the sacred writings of the Christian religions
  12. close to (of quantities) imprecise but fairly close to correct
  13. closeout a sale intended to dispose of all remaining stock
  14. closed-chain having atoms linked by bonds represented in circular or triangular form
  15. closed chain a chain of atoms in a molecule that forms a closed loop
  16. closed not open
  17. clastic rock (geology) a rock composed of broken pieces of older rocks
  18. cluster bean drought-tolerant herb grown for forage and for its seed which yield a gum used as a thickening agent or sizing material
  19. closelipped inclined to secrecy or reticence about divulging information
  20. lose track fail to keep informed or aware

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