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Adjective: valid  va-lid
  1. Well grounded in logic, truth or having legal force
    "a valid contract"; "a valid inference"; "a valid argument"
     
  2. Still legally acceptable
    "the licence is still valid"

See also: binding, effectual, legal, legitimate, logical, reasonable, reasoned, sensible, sound, unexpired, validated, well-grounded

Antonym: invalid

Encyclopedia: Valid