criminal
Americanadjective
noun
noun
-
a person charged with and convicted of crime
-
a person who commits crimes for a living
adjective
-
of, involving, or guilty of crime
-
(prenominal) of or relating to crime or its punishment
criminal court
criminal lawyer
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informal senseless or deplorable
a criminal waste of money
Usage
What is a basic definition of criminal? A criminal is a person who commits crime. Criminal is also used to describe something involved in committing crime or related to crime. Criminal has a few other senses as an adjective. A criminal is a person who breaks the law and engages in illegal activity.
- Real-life examples: Shoplifters, kidnappers, bank robbers, and pirates are all criminals.
- Used in a sentence: The judged sentenced the two wanted criminals to prison for stealing a car.
- Real-life examples: Stealing a car, robbing someone’s house, and printing fake money to use as real money are all criminal acts. They are all against the law, and a person will be arrested if caught doing any of these acts. Police might say a person is accused of criminal activity if they believe the person was doing something illegal.
- Used in a sentence: The gangster Al Capone was in charge of a criminal organization.
- Real-life examples: In the United States, criminal law is a collection of laws that state what the government or society says is a crime and will result in punishment by the state if someone is proved to have broken the law. A criminal lawyer is a lawyer who specializes in criminal law.
- Used in a sentence: When Jimmy was arrested for breaking into his neighbor’s house, he called a criminal lawyer to help him.
Related Words
See illegal.
Other Word Forms
- criminally adverb
- noncriminal adjective
- noncriminally adverb
- quasi-criminal adjective
- quasi-criminally adverb
- subcriminal adjective
- subcriminally adverb
- supercriminal adjective
- supercriminally adverb
- uncriminal adjective
- uncriminally adverb
Etymology
Origin of criminal
First recorded in 1350–1400; Middle English, from Anglo-French, from Late Latin crīminālis, from Latin crīmin- (stem of crīmen “accusation, blame, charge”; see crime) + -ālis -al 1
Explanation
A criminal is someone who breaks the law. If you're a murderer, thief, or tax cheat, you're a criminal. When you think of criminals, your first thought might be of someone awful like a murderer. But this word is a lot broader — Anyone who breaks the law is technically a criminal, even if the crime is just not paying a speeding ticket. You can also talk about criminal activities: things that are illegal. Lots of TV shows are about police officers and lawyers trying to catch criminals who are engaged in all kinds of exciting criminal activity.
Vocabulary lists containing criminal
Way Off: Synonyms for "Wrong"
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Module 1: Vocabulary Video Words
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Crime and Punishment
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Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
Nathan Hochman said Hernandez “threatened to expose his criminal conduct,” but declined to elaborate on what specifically happened.
From Los Angeles Times • Apr. 22, 2026
In her statement, Cherfilus-McCormick said the panel did not allow her lawyer to adequately prepare her defence and launched the investigation while she was fighting a criminal case, which ultimately "prevented me from defending myself".
From BBC • Apr. 21, 2026
On Tuesday, Uthmeier said his office would be sending criminal subpoenas to OpenAI.
From The Wall Street Journal • Apr. 21, 2026
Even after criminal convictions, civil judgments and years of litigation, Schwartz remained elusive to the people seeking answers or accountability.
From Salon • Apr. 21, 2026
I felt a bit like a criminal, spying on my sister.
From "Code Name Kingfisher" by Liz Kessler
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
