English▸ noun [mass noun] the action of checking or proving the validity or accuracy of something:
the technique requires validation in controlled trials
[count noun] we did independent validations for studies of therapy.
▪ the action of making or declaring something legally or officially acceptable:
new courses, subject to validation, include an MSc in Urban Forestry.
▪ recognition or affirmation that a person or their feelings or opinions are valid or worthwhile:
they have exaggerated needs for acceptance and validation.