| Main Entry: | |
| Part of Speech: | adjective |
| Definition: | illegal |
| Synonyms: | black-market, bootlegged, contraband, illicit, pirated, smuggled, unauthorized, under-the-counter, unlawful, unofficial, unsanctioned |
| Antonyms: | legal |
| Main Entry: | null |
| Part of Speech: | adjective |
| Definition: | ineffectual, valueless |
| Synonyms: | absent, bad, barren, characterless, imaginary, ineffective, inefficacious, inoperative, invalid, negative, nonexistent, nothing, null and void, powerless, unavailing, unreal, unsanctioned, useless, vain, void, worthless |
| Antonyms: | effective, effectual, valid, valuable, worthwhile, worthy |
| Main Entry: | unauthorized |
| Part of Speech: | adjective |
| Definition: | not sanctioned, permitted |
| Synonyms: | crooked*, dirty*, illegal, illegitimate, no-no, off base, out of bounds, out of line, over the line, pirated, shady*, unapproved, unconstitutional, under the table, unjustified, unlawful, unofficial, unsanctioned, unwarranted, wildcat, wrongful |
| Antonyms: | allowable, authorized, official, permitted |
| Main Entry: | void |
| Part of Speech: | adjective |
| Definition: | nullified, meaningless |
| Synonyms: | avoided, bad, dead, forceless, fruitless, ineffective, ineffectual, inoperative, invalid, negated, not viable, nugatory, null, null and void, set aside, sterile, unconfirmed, unenforceable, unfruitful, unratified, unsanctioned, unsuccessful, useless, vain, voided, worthless |
| Notes: | void means empty; devoid means empty, but empty only after something has been taken away |
| Antonyms: | full, meaningful, valid |
| Main Entry: | unofficial |
| Part of Speech: | adjective |
| Definition: | informal |
| Synonyms: | casual, contraband, officious, offstage, unauthorized, unorthodox, unsanctioned |
| Antonyms: | confirmed, official |
| Main Entry: | unofficial |
| Part of Speech: | adjective |
| Definition: | unauthorized |
| Synonyms: | informal, off the record, personal, private, unconfirmed, uncorroborated, unsanctioned |
| Antonyms: | authoritative, authorized, confirmed, official |