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English definition of “valid”

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valid

adjective
 
 
/ˈvælɪd/
a valid ticket, document, agreement, etc. is legal and can be officially accepted, usually for a particular period of time: Is this ticket still valid? A credit card is not usually accepted as a valid form of I.D. Applicants must be in possession of a valid passport.valid for 6 months, a year, etc. Permits are valid for a year. The court decided shareholders had a valid claim against the Chairman for his part in the company's downfall.
IT valid data or details are accepted by a computer system because they are correct
that can be accepted as being true or reasonable: The points she made were perfectly valid.
validly adverb
(Definition of valid from the Cambridge Business English Dictionary © Cambridge University Press)
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