predefined       
adjective uk/ˌpriː.dɪˈfaɪnd/ us/ˌpriː.dɪˈfaɪnd/
 预先设定的;预先明确的
decided, set, or arranged before something is done
  The chart can be filled out with a predefined set of values. 这个图表可以用预定义的一组值来填写。 
 What happens when usage falls below predefined thresholds? 当使用量低于预定义阈值时,会发生什么? 
 - More examples
 - We don't have any predefined criteria.
 - The computer generates a random number at a predefined interval.
 - You cannot delete predefined objects.