valid
adjective
well grounded in logic or truth or having legal force
“a valid inference”
“a valid argument”
Oppositesinvalidstill legally acceptable
“the license is still valid”
Source: WordNet 3.1, Princeton University
Valid meaning
What does “valid” mean? Definitions, examples, synonyms and opposites.
“valid” is an adjective with 2 meanings. Its most common meaning is: well grounded in logic or truth or having legal force.