Definition from Wiktionary, the free dictionary
Possibly influenced by Old English handcops, from hand + cops (“fetter, chains”), but due to lack of continuity (centuries between Old English and modern term), generally analyzed as a re-invention.
- (plural only) A fastening consisting of two metal rings, designed to go around a person's wrists, and connected by a chain or hinge.
- Plural form of handcuff
Related terms 
metal rings for fastening wrists
- Third-person singular simple present indicative form of handcuff.
- “handcuffs” in Douglas Harper, Online Etymology Dictionary (2001).