Simple Definition of valid
: fair or reasonable
: acceptable according to the law
Full Definition of valid
1 : having legal efficacy or force; especially : executed with the proper legal authority and formalities <a valid contract>
2 a : well-grounded or justifiable : being at once relevant and meaningful <a valid theory> b : logically correct <a valid argument> <valid inference>
3 : appropriate to the end in view : effective <every craft has its own valid methods>
4 of a taxon : conforming to accepted principles of sound biological classification
Examples of valid
There is no valid reason to proceed with the change.
Her objections were completely valid.
You make a valid point.
You must present valid identification.
Their marriage is not legally valid.
The agreement is no longer valid under international law.
Origin of valid
Middle French or Medieval Latin; Middle French valide, from Medieval Latin validus, from Latin, strong, potent, from valēre
First Known Use: 1571
Synonym Discussion of valid
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