verb (used with object), validated, validating.
to make valid; substantiate; confirm: Time validated our suspicions.
to give legal force to; legalize.
to give official sanction, confirmation, or approval to, as elected officials, election procedures, documents, etc.: to validate a passport.

1640–50; < Medieval Latin validātus (past participle of validāre to make valid), equivalent to valid- (see valid) + -ātus -ate1

validation, noun
validator, noun
validatory [val-i-duh-tawr-ee, -tohr-ee] , adjective
nonvalidation, noun
revalidate, verb (used with object), revalidated, revalidating.
revalidation, noun
unvalidated, adjective
unvalidating, adjective

1. authenticate, verify, prove.

1. disprove. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
validate (ˈvælɪˌdeɪt)
1.  to confirm or corroborate
2.  to give legal force or official confirmation to; declare legally valid

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Word Origin & History

1640s, from L. validatus, from validus (see valid). Related: Validated.
Online Etymology Dictionary, © 2010 Douglas Harper
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Computing Dictionary

validation definition

The stage in the software life-cycle at the end of the development process where software is evaluated to ensure that it complies with the requirements.

The Free On-line Dictionary of Computing, © Denis Howe 2010
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Example sentences
Politicians chase the media for validation of their power.
Thank you for the kind words and for the validation.
Keep in mind that estimation and validation of these models is one and the same
The teams train for a total of four weeks in the airport before they are given
  their validation test and, hopefully, graduate.
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