D defs.my
Entry 2 senses Webster, 1913

Faller

/fôl'-ẽr/ · Fall·er · IPA /fˈɔlər/
01 n. One who, or that which, falls.
  1. 1.
    One who, or that which, falls.
  2. 2.
    A part which acts by falling, as a stamp in a fulling mill, or the device in a spinning machine to arrest motion when a thread breaks.(Mach.)