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conjunction or pronunciation in British English /ɔː(r)/
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  1. 1
    used for connecting possibilities or choices. In a list, ‘oris usually used only before the last possibility or choice
    Which colour do you want – red, green, yellow, or blue?
    He’s probably at lunch or in a meeting.
    either... or: ‘When will you get the results?’ ‘Either tomorrow or the day after.’
    whether... or: You don’t care whether he lives or dies, do you?
    or not: The jury must decide whether the prisoner is guilty or not.
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  2. 2
    used for including someone or something else in a negative statement
    She’s had nothing to eat or drink all day.
    I never had any help or advice from my parents.
    Synonyms and related words
  3. 3
    used between two similar numbers for showing that you do not know what the exact number is
    one or two/two or three/three or four etc: I can photocopy your notes. It’ll only take a minute or two.
    The car has to be serviced every five or six thousand miles.
    Synonyms and related words
  4. 4
    used for saying what will happen if someone does not do something
    The soldiers told everyone to leave or they would be shot.
    or else: We must deal with the problem now, or else it will be too late.
    You’d better do what I say, or else (=I will do something bad to you).
    Synonyms and related words
  5. 5
    used for introducing a comment that corrects or adds more information to what you have just said
    There are six cashpoints, or ATMs, in the main airport terminal.
    or rather: This is a problem for the government, or rather for the Prime Minister, to deal with.
    Synonyms and related words
  6. 6
    used when you are trying to show that something must be true, by saying that the situation would be different if it was not true
    He obviously doesn’t have a plan, or he would have said something.
    or else: It must be something serious, or else they wouldn’t have radioed for help.
    Synonyms and related words



a course of study which is much shorter than a university course and focuses on the skills you need for a job, especially computer-related skills

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an ancient Roman system of underfloor heating, used to heat houses with hot air; from the Latin 'hypocaustum'

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