illegal

1 contrary to or forbidden by law it is illegal to import those birds into this country Synonyms criminal, felonious, illegitimate, illicit, lawless, unlawful, wrongful Related Words bad, evil, immoral, shameful, sinful, unethical, wicked, wrong; blamable, blameworthy, censurable, reprehensible; banned, barred, contraband, criminalized, disallowed, discouraged, forbidden, interdicted, outlawed, prohibited, proscribed; adulterine, bootleg, unauthorized, unlicensed, unsanctioned; under-the-counter, under-the-table; corrupt, unprincipled, unscrupulous, villainous Near Antonyms ethical, good, just, principled, right, righteous, virtuous; allowed, permitted; authorized, licensed; approved, endorsed (also indorsed), sanctioned; abetted, encouraged, promoted, suggested, supported; correct, decent, decorous, proper, seemly Antonyms lawful, legal, legitimate

2 not being in accordance with the rules or standards of what is fair in sport an illegal pass Synonyms dirty, foul, nasty, unfair, unsportsmanlikeRelated Words dishonorable, shabby, shameful; ignoble, low, mean, ungentlemanly; immoral, rotten, unchivalrous, unethical, unjust, unprincipled, unrighteous, unscrupulousNear Antonyms just, law-abiding; ethical, moral, principled, righteous, scrupulous; honorable, irreproachable, unimpeachableAntonyms clean, fair, legal, sportsmanlike, sportsmanly