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open up - definition and synonyms


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90% of the time, speakers of English use just 7,500 words in speech and writing. These words appear in red, and are graded with stars. One-star words are frequent, two-star words are more frequent, and three-star words are the most frequent.



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phrasal verb
Word Forms
present tense
I/you/we/theyopen up
he/she/itopens up
present participleopening up
past tenseopened up
past participleopened up

Related words

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  1. 1
    [intransitive/transitive] to open a locked door, container, or building
    He opens up the drugstore every morning.
    Open up! This is the police!
  2. 2
    [intransitive] to talk more about your personal feelings and experiences
    open up to: It’s taken a few months, but Katy is now starting to open up to me.
  3. 3
    [intransitive/transitive] if something opens up or you open it up, it opens from a folded position so that you can see its shape
    Look, the rose buds are beginning to open up.
    I opened up a folding chair for my grandmother.
  4. 4
    [intransitive/transitive] if a discussion opens up, or if you open it up, it becomes more general or starts to include more subjects
    I think we need to open up the discussion and ask members of the audience for their opinions.
  5. 5
    [intransitive/transitive] to make it easier to travel or do business in a country
    The building of canals opened up the interior of the country.
    open up to: China is opening up to foreign investment.
  6. 6
    [intransitive/transitive] to create a new opportunity or possibility
    Going freelance opens up all sorts of possibilities to you.
    New markets are opening up every day.
  7. 7
    [intransitive/transitive] to create a difference between the people or groups involved in something
    The issue of immigration has opened up deep divisions within the party.
    The Braves have opened up a three game lead over the second-place team.
  8. 8
    [intransitive] to start shooting a gun
    He opened up on the crowd with an automatic rifle.
    Synonyms and related words
  9. 9
    [transitive]open someone up informal to cut into someones body for medical reasons
    When they opened her up they found a huge tumor.
  10. 10
    [intransitive/transitive] same as open2 (sense 5)
    Donald wants to retire and open up a bookstore.
  11. 11
    [intransitive/transitive] if something opens up, or if you open it up, it opens from a folded position so that you can see its shape
    The rose buds are beginning to open up.
    She opened her umbrella up at the first drops of rain.
See also main entry: open


a meal served in the evening which consists of foods traditionally eaten at breakfast

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troll factory

a company that pays its employees to write online comments in favour or against somebody or something posing as ordinary Internet users

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