1 : involving illegal activity : relating to crime
▪ committing criminal acts/activities ▪ a criminal organization ▪ a history of criminal behavior ▪ We're trying to understand how the criminal mind [=the mind of someone who commits crimes] works. ▪ The captain of the wrecked boat was accused of criminal negligence. 2 always used before a noun : relating to laws that describe crimes rather than to laws about a person's rights
▪ the criminal justice system ▪ a criminal court/case/trial ▪ criminal proceedings ▪ criminal lawyers [=lawyers who represent people accused of a crime] ▪ The company brought/filed criminal charges against her. ▪ Using this drug is a criminal offense. [=it is illegal to use this drug] ▪ The police are conducting a criminal investigation. [=they are investigating a crime] — compare civil 5; see also criminal law 3 not used before a noun [more criminal; most criminal] : morally wrong
▪ It's criminal that the government is doing nothing to stop the problem. — often used in a joking way to say that someone should not do something ▪ In my opinion, it would be criminal to miss seeing this movie. [=I think everyone should see this movie]
▪ committing criminal acts/activities ▪ a criminal organization ▪ a history of criminal behavior ▪ We're trying to understand how the criminal mind [=the mind of someone who commits crimes] works. ▪ The captain of the wrecked boat was accused of criminal negligence.
▪ the criminal justice system ▪ a criminal court/case/trial ▪ criminal proceedings ▪ criminal lawyers [=lawyers who represent people accused of a crime] ▪ The company brought/filed criminal charges against her. ▪ Using this drug is a criminal offense. [=it is illegal to use this drug] ▪ The police are conducting a criminal investigation. [=they are investigating a crime] — compare civil 5; see also criminal law
▪ It's criminal that the government is doing nothing to stop the problem. — often used in a joking way to say that someone should not do something ▪ In my opinion, it would be criminal to miss seeing this movie. [=I think everyone should see this movie]
— crim·i·nal·ly adverb
▪ criminally liable/responsible
▪ criminally liable/responsible





