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English definition of “valid”

valid

adjective     /ˈvælɪd/
GOOD REASONS B2 based on good reasons or facts that are true: a valid argument Suitable and acceptableQuite good, or not very good
DOCUMENT B2 A valid ticket or document is legally acceptable: The ticket is valid for three months. → Opposite invalidAllowing and permittingLegal and illegal
validity     /vəˈlɪdəti/ noun [U]
(Definition of valid adjective from the Cambridge Learner's Dictionary © Cambridge University Press)

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