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Verb: open up
  1. Cause to allow entrance or exit; allow entry after being shut
    "Mary opened up the car door";
    - open
  2. Become available
    "an opportunity opened up";
    - open
  3. Make available
    "This opens up new possibilities";
    - open
  4. Open up an area or prepare a way
    "She opened up a graduate program for women students";
    - pioneer
  5. Start to operate or function or cause to start operating or functioning
    "open up a business";
    - open
  6. Become open
    "The door opened up";
    - open
  7. Talk freely and without inhibition

Derived forms: opened up, opens up, opening up

Type of: afford, arise, change state, come up, give, innovate, introduce, mouth, speak, talk, turn, utter, verbalise [Brit], verbalize, yield

Antonym: close up

Encyclopedia: Open up, yoga hoser!