--adj.

1. morally bad in principle or practice.

--adj.

2. intensely or extremely bad or unpleasant in degree or quality.
  • "Under wicked fire from the enemy's guns."
3. naughtily or annoyingly playful.
  • "A wicked prank."
4. highly offensive; arousing aversion or disgust.
  • "A wicked stench."
5. having committed unrighteous acts.
1154, perhaps from adj. use of Old English wicca "wizard." Slang ironic sense of "wonderful" is attested since 1920.
How to use "wick·ed"?
Every criminal act is illegal or unlawful, but illegal or unlawful acts may not be criminal. Offenses against public law are criminal; offenses against private rights are merely illegal or unlawful. As a general rule, all acts punishable by fine or imprisonment or both, are criminal in view of the law. It is illegal for a man to trespass on another's land, but it is not criminal; the trespasser is liable to a civil suit for damages, but not to indictment, fine, or imprisonment. A felonious act is a criminal act of an aggravated kind, which is punishable by imprisonment in the penitentiary or by death. A flagitious crime is one that brings public odium. Vicious refers to the indulgence of evil appetites, habits, or passions; vicious acts are not necessarily criminal, or even illegal; we speak of a vicious horse. That which is iniquitous, i. e., contrary to equity, may sometimes be done under the forms of law. Ingratitude is sinful, hypocrisy is wicked, but neither is punishable by human law; hence, neither is criminal or illegal. Compare SIN.
Synonyms
  • abominable - unequivocally detestable. "Abominable treatment of prisoners."
  • flagitious - extremely wicked, deeply criminal. "A flagitious crime."
  • immoral - deliberately violating accepted principles of right and wrong.
  • sinful - characterized by iniquity; wicked because it is believed to be a sin. "He said it was sinful to wear lipstick."
  • vile - morally reprehensible. "The vile development of slavery appalled them."
  • culpable - deserving blame or censure as being wrong or evil or injurious. "Culpable negligence."
  • guilty - responsible for or chargeable with a reprehensible act. "Guilty of murder."
  • iniquitous - characterized by iniquity; wicked because it is believed to be a sin. "Iniquitous deeds."
  • unlawful - not morally right or permissible. "Unlawful love."
  • wicked - morally bad in principle or practice.
  • felonious - involving or being or having the nature of a crime. "Felonious intent."
  • illegal - prohibited by law or by official or accepted rules. "An illegal chess move."
  • nefarious - extremely wicked. "Nefarious schemes."
  • vicious - (of persons or their actions) able or disposed to inflict pain or suffering. "Vicious kicks."
Antonyms
  • innocent - free from evil or guilt. "An innocent child."
  • lawful - having a legally established claim. "The true and lawful king."
  • meritorious - deserving reward or praise. "A lifetime of meritorious service."
  • right - an abstract idea of that which is due to a person or governmental body by law or tradition or nature. "Certain rights can never be granted to the government but must be kept in the hands of the people."
  • just - and nothing more. "Just a scratch."
  • legal - of or relating to jurisprudence. "Legal loophole."
  • moral - concerned with principles of right and wrong or conforming to standards of behavior and character based on those principles. "Moral sense."