| Main Entry: | contraband |
| Part of Speech: | adjective |
| Definition: | black-market; unlawful |
| Synonyms: | banned, bootleg, bootlegged, disapproved, excluded, forbidden, hot*, illegal, illicit, interdicted, prohibited, proscribed, shut out, smuggled, taboo, unauthorized, verboten |
| Antonyms: | allowed, lawful, legal, permitted |
| Main Entry: | forbidden |
| Part of Speech: | adjective |
| Definition: | outlawed, prohibited |
| Synonyms: | banned, closed, closed-down, closed-up, contraband, no-no, off limits, out of bounds, proscribed, refused, taboo*, verboten, vetoed |
| Antonyms: | allowed, approved, authorized, permitted, sanctioned |
| Main Entry: | illegal |
| Part of Speech: | adjective |
| Definition: | against the law |
| Synonyms: | actionable, banned, black-market, bootleg, contraband, criminal, crooked, extralegal, felonious, forbidden, heavy*, hot*, illegitimate, illicit, interdicted, irregular, lawless, not approved, not legal, outlawed, outside the law, prohibited, proscribed, prosecutable, racket, shady, smuggled, sub rosa, taboo, unauthorized, unconstitutional, under the table, unlawful, unlicensed, unofficial, unwarrantable, unwarranted, verboten, violating, wildcat, wrongful |
| Notes: | a form of conduct will be illicit and a type of practice will be illegal |
| Antonyms: | allowed, authorized, ethical, good, lawful, legal, legitimate, moral, permissible, right |
| Main Entry: | off-limits |
| Part of Speech: | adjective |
| Definition: | prohibited |
| Synonyms: | against the law, banned, barred, forbidden, illegal, illicit, no-no, not allowed, out of bounds, outlawed, restricted, taboo, unlawful, verboten |
| Main Entry: | prohibited |
| Part of Speech: | adjective |
| Definition: | forbidden |
| Synonyms: | banned, barred, closed down, contraband, crooked*, illegal, illicit, no-no, not allowed, not approved, off limits, out of bounds, out of line, proscribed, refused, restricted, shady*, taboo, verboten, vetoed, wildcat |
| Antonyms: | allowed, permitted |
| Main Entry: | taboo |
| Part of Speech: | adjective |
| Definition: | not allowed, permitted |
| Synonyms: | anathema, banned, beyond the pale, disapproved, forbidden, frowned on, illegal, off limits, out of bounds, outlawed, prohibited, proscribed, reserved, restricted, ruled out, unacceptable, unmentionable, unthinkable |
| Antonyms: | acceptable, allowed, mentionable, ok |
| Main Entry: | unconstitutional |
| Part of Speech: | adjective |
| Definition: | illegal |
| Synonyms: | against the law, banned, criminal, felonious, forbidden, illegitimate, illicit, lawless, not legal, outlawed, prohibited, prosecutable, unauthorized, unlawful, violating, wrongful |
| Main Entry: | unlawful |
| Part of Speech: | adjective |
| Definition: | against the law |
| Synonyms: | actionable, banned, bootleg, criminal, flagitious, forbidden, illegal, illegitimate, illicit, improper, iniquitous, lawless, nefarious, outlawed, prohibited, taboo, unauthorized, under-the-counter, unlicensed, wrongful |
| Antonyms: | authorized, lawful, legal, right |