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Verb: illegalise  i'lee-gu,lIz
Usage: Brit (N. Amer: illegalize)
  1. Declare illegal; outlaw
    "Marijuana is illegalised in the U.S.";
    - outlaw, criminalize, criminalise [Brit], illegalize

Derived forms: illegalising, illegalised, illegalises

Type of: disallow, forbid, interdict, nix [N. Amer], prohibit, proscribe, veto