adjective
having the power to impress others as right and well-founded
a valid conclusion
Synonyms: cogent, convincing, satisfactory, satisfying, solid, sound, telling
Related Word: persuasive, potent, strong; attested, confirmed, corroborated, demonstrated, determined, established, substantiated, validated, verified; lawful, legal, licit; effective, effectual; conclusive, decisive, definitive, determinative; acceptable
Contrasted words: groundless, shaky, unconvincing, unfounded, unsound; fallacious, false, misleading, sophistical; counterfeit, fictitious
Antonyms: invalid