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Meaning of cross-validation

cross-val•i•da•tion

Pronunciation: (krôs'val"i-dā'shun, kros'-), [key]
— n. Statistics.
  1. a process by which a method that works for one sample of a population is checked for validity by applying the method to another sample from the same population.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.