one of a pair of linked ornamental buttons or buttonlike devices for fastening a shirt cuff.
Origin of cuff link
First recorded in 1895–1900
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
British Dictionary definitions for cufflinks
one of a pair of linked buttons, used to join the buttonholes on the cuffs of a shirt
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012