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According to [JMDict](http://tangorin.com/general/%E4%BA%88%E7%B4%84) 予約 is
translated as

  1. reservation; appointment; booking; advance order
  2. contract; subscription; pledge

None of the meanings above seem to make sense to one of the function labels on
a washing machine.
CC BY-SA 3.0
2017-06-13T19:31:50.463
48370
2017-06-13T19:36:14.747
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question
pragmatics
What is a meaning of 予約 on the washing machine?
On Japanese washing machines the 予約 is designed to set a timer for the washing
machine to start. For example, if you don't want wet clothes to be in the
machine while you're at work you can put clothing in there, set a 予約 timer for
a an hour before you return and then it won't start the cycle until then.
CC BY-SA 3.0
2017-06-13T19:36:14.747
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2017-06-13T19:36:14.747
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answer