IPA: /ˈkrɪnəˌliːn/
KK: /ˈkrɪnəˌlin/
A type of stiff fabric or a skirt made from it, often used to give shape to dresses and hats.
She wore a beautiful dress with a crinoline underneath to make it look fuller.
Crinoline is derived from "crin" (from French, meaning horsehair) and "-line" (a suffix meaning made of or pertaining to). The word refers to a fabric made from horsehair, often used in petticoats and skirts to give them volume.
Think of 'horsehair' ('crin') being used to make a fabric, which is what crinoline is all about — a material that adds volume to clothing.