Generally, theft is to take the property or service of others without permission or consent of others, so as to deprive the legitimate owner of the property or service. The term is also used informally for crimes against property, such as theft, misappropriation, theft, robbery, robbery, shoplifting, library theft and fraud. In some jurisdictions, theft is considered synonymous with larceny; in other cases, theft has replaced larceny. The person who is engaged in theft or theft is called a thief. Theft is also known by other terms as theft, theft, and theft.

Theft is the name of a statutory offence in California, Canada, England and Wales, Hong Kong, Northern Ireland, the Republic of Ireland, South Australia and Victoria.

Theft is usually defined as unauthorized misappropriation, retention or use of another person's property, which must be accompanied by a man's dishonesty and with the intention of permanently depriving the owner or the person who owns or uses the property legally.

For example, if x goes to a restaurant and mistakenly takes Y's scarf instead of her scarf, she actually deprives y of the right to use the property (which is the reuse of behavior), but mistakenly prevents x from forming a man's intention (that is, because she thinks she is the owner, so she is not honest and does not intend to deprive the owner of ownership), so there is no Crime. However, if she finds a mistake when she gets home and can return the scarf to y, then if she keeps the scarf dishonestly, she will steal it (by looking for the stolen one). Please note that the infringement of an act of tort may create civil liability, or in any case may lead to conversion.