noun sta·nine \ˈstā-ˌnīn\

Definition of stanine

  1. :  any of the nine classes into which a set of normalized standard scores arranged according to rank in educational testing are divided, which include the bottom 4 percent and the top 4 percent of the scores in the first and ninth classes and the middle 20 percent in the fifth, and which have a standard deviation of 2 and a mean of 5

Origin and Etymology of stanine

standard (score) + nine

First Known Use: 1944

Seen and Heard

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to criticize severely

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