American Heritage Dictionary of the English Language, 5th Edition
From Frenchbarrette, from barre (“bar”) + -ette, literally “small bar”.
Barrette Sentence Examples
Take a small trial or travel size bottle of hair spray with you to tame any strands that come loose, and be sure to tuck an extra bobby pin or barrette into your purse if your style uses them.
A rhinestone barrette held her hair in a messy updo.
By the 17th century it had given place in ordinary civil life to the brimmed hat; but in various shapes it still survives as official head-gear in many European countries: the Barett, worn in church by the Lutheran clergy, in the courts by German lawyers, and by the deans and rectors of the universities, the barrette of French judges and barristers, the "black cap" of the English judge, and the "college cap" familiar in English and American universities, and vulgarly known as the "mortar-board."
Simply twist back a chunk of hair and fasten with a barrette.