adjective
contrary to or prohibited by law
the spread of unlawful wiretapping
Synonyms: criminal, illegal, illegitimate, illicit, lawless, wrongful
Related Word: flagitious, iniquitous, nefarious; black-market, bootleg, under-the-counter; exceptionable, improper, intolerable, objectionable
Idioms: against the law
Contrasted words: condign, due, rightful; allowable, justifiable, permissible
Antonyms: lawful