Definition - open

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  1. (set theory) of an interval that contains neither of its endpoints
  2. display the contents of a file or start an application as on a computer
  3. open and observable; not secret or hidden; "an overt lie"; "overt hostility"; "overt intelligence gathering"; "open ballots"
  4. afford access to; "the door opens to the patio"; "The French doors give onto a terrace"
  5. information that has become public; "all the reports were out in the open"; "the facts had been brought to the surface"
  6. open to or in view of all; "an open protest"; "an open letter to the editor"
  7. begin or set in action, of meetings, speeches, recitals, etc.; "He opened the meeting with a long speech"
  8. a tournament in which both professionals and amateurs may play
  9. with no protection or shield;
  10. start to operate or function or cause to start operating or functioning; "open a business"
  11. where the air is unconfined; "he wanted to get outdoors a lit

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