illegal meaning, illegal definition | English Cobuild dictionary

Collins

illegal

  

      adj  
1    forbidden by law; unlawful; illicit  
2    unauthorized or prohibited by a code of official or accepted rules  
      n  
3    a person who has entered or attempted to enter a country illegally  
  illegally      adv  
  illegality      n  
English Collins Dictionary - English Definition & Thesaurus  
Collins

illegal

  
  
actionable     (Law)   banned, black-market, bootleg, criminal, felonious, forbidden, illicit, lawless, off limits, outlawed, prohibited, proscribed, unauthorized, unconstitutional, under-the-counter, under-the-table, unlawful, unlicensed, unofficial, wrongful  
  
Antonyms     
   lawful, legal, licit, permissible  

English Collins Dictionary - English synonyms & Thesaurus  

Collaborative Dictionary     English Definition
n.
A plan done for something bad or illegal.
I will never scheme in the future because it is a bad thing to do.
n.
Cyberextortion is online crime threatening to attack a person coupled with demand of illegal gains to stop the attack
[Leg.];[Tech.] online threat to gain illegal gains

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"Collins English Dictionary 5th Edition first published in 2000 © HarperCollins Publishers 1979, 1986, 1991, 1994, 1998, 2000 and Collins A-Z Thesaurus 1st edition first published in 1995 © HarperCollins Publishers 1995"