I
verb
1
BAD : I was so excited that I forgot to order them to check that the camera was working properly.
GOOD : I was so excited that I forgot to ask them to check that the camera was working properly.
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You cannot order someone to do something unless you have the power to do so. Compare: 'The teacher ordered the child to sit down.' 'She asked her teacher if he could check her homework.'
2
BAD : I've ordered two seats for tomorrow night's performance.
GOOD : I've booked two seats for tomorrow night's performance.
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See note at BOOK (↑ book )
II
noun
DUBIOUS : Turning on the radio, I noticed immediately that it was out of order.
GOOD : Turning on the radio, I noticed immediately that it was not working properly.
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The phrase out of order is used mainly on notices stating that things such as public telephones, ticket machines, photocopiers etc are not working.