"Flap closure" refers to the act of shutting or covering something by means of a flap. It is a way to seal or secure an opening or entrance using a movable piece of material that can be folded, tucked, or fastened into place. Full definition
Crafted from brown leather, it has a magnetic flap closure that opens to a satin - lined interior housing a patch pocket. (tradesy.com)
It's big enough to fit credit cards and cash, and has a snap button flap closure. (amazon.com)
Beige leather «PS1» satchel from Proenza Schouler featuring a top handle, a detachable shoulder strap, a front flap closure with a brass - tone clasp fastening, two front straps, a concealed zip fastening, an interior zip fastening pocket with an embossed signature logo and a black patterned lining. (polyvore.com)