Princeton's WordNet(1.00 / 2 votes)Rate these antonyms:

1. valid(adj)

   well grounded in logic or truth or having legal force

   "a valid inference"; "a valid argument"; "a valid contract"

   Antonyms:
   fallacious, invalidated, null, expired, sophistical, uncollectible, bad, nullified, false, unsound, invalid, sophistic, void

2. valid(adj)

   still legally acceptable

   "the license is still valid"

   Antonyms:
   sophistical, expired, uncollectible, invalid, bad, nullified, invalidated, unsound, false, sophistic, null, fallacious, void

Wiktionary(0.00 / 0 votes)Rate these synonyms:

1. valid(adjective)

   Antonyms:
   invalid

2. valid(adjective)

   Well grounded or justifiable, pertinent.

   Antonyms:
   invalid

3. valid(adjective)

   Acceptable, proper or correct.

   Antonyms:
   invalid

4. valid(adjective)

   Related to the current topic, or presented within context, relevant.

   Antonyms:
   invalid

5. valid(adjective)

   A formula or system that evaluates to true regardless of the input values.

   Synonyms:
   tautological

   Antonyms:
   invalid

6. valid(adjective)

   An argument whose conclusion is always true whenever its premises are true.

   Antonyms:
   invalid

English Synonyms and Antonyms(4.00 / 1 vote)Rate these synonyms:

1. valid

   Synonyms:
   adequate, advantageous, beneficial, competent, effective, efficient, expedient, potent, powerful, profitable, real, serviceable, solid, sound, substantial, sufficient, useful, valuable, worthy

   Antonyms:
   abortive, baseless, bootless, deceitful, delusive, empty, fruitless, futile, idle, inconstant, ineffectual, nugatory, null, profitless, shadowy, trifling, trivial, unavailing, unimportant, unprofitable, unreal, unsatisfying, unserviceable, unsubstantial, useless, vain, vapid, visionary, worthless

Dictionary of English Synonymes(0.00 / 0 votes)Rate these synonyms:

1. valid(a.)

   Synonyms:
   efficacious, efficient, sound, weighty, powerful, conclusive, logical, cogent, persuasive, good, just, solid, important, grave, sufficient, strong, not weak, not defective, not frivolous, not fallacious

PPDB, the paraphrase database(0.00 / 0 votes)Rate these synonyms:

List of paraphrases:

validity, válido, effective, validates, meaningful, validate, valuable, worthwhile, able-bodied, sound, invalid, good, true, sari, legitimate, applicable, effectively, viable, tenable, justified, worthy, well-founded, validated

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