noun
Definition: A device made of two metal rings that are connected and can be locked around a person's wrists to keep them restrained, often used by police on arrested individuals.
Example: The police officer put handcuffs on the suspect to prevent him from escaping.
transitive verb
Definition: To restrain someone's hands by fastening them with metal cuffs, usually for security or law enforcement purposes.
Example: The police officer had to handcuff the suspect before taking him to the station.