| Main Entry: | invalid |
| Part of Speech: | adjective |
| Definition: | worthless; unfounded |
Synonyms: |
bad, baseless, fallacious, false, ill-founded, illogical, inoperative, irrational, mad, not binding, not working, nugatory, null, null and void, reasonless, sophistic, unreasonable, unreasoned, unscientific, unsound, untrue, void, wrong |
Antonyms: |
sound, valid, worthwhile, worthy |