Adjective

• S: (adj) valid (well grounded in logic or truth or having legal force) "a valid inference"; "a valid argument"; "a valid contract"
• see also
• similar to
• S: (adj) binding (executed with proper legal authority) "a binding contract"
• S: (adj) legal, sound, effectual (having legal efficacy or force) "a sound title to the property"
• similar to
• derivationally related form
• antonym
• S: (adj) legitimate, logical (based on known statements or events or conditions) "rain was a logical expectation, given the time of year"
• S: (adj) reasoned, sound, well-grounded (logically valid) "a sound argument"
• S: (adj) validated (declared or made legally valid) "a validated claim"
• antonym
• derivationally related form
• S: (adj) valid (still legally acceptable) "the license is still valid"