- a strap attached to a hat for passing under the chin of the wearer.
- a strap to support the chin in cosmetic facial treatment.
- a strap on a bridle or halter that joins the throatlatch and noseband.
Origin of chin strap
First recorded in 1865–70
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018