A cloth or stuff made of mattedfibres of wool, or wool and fur, fulled or wrought into a compact substance by rolling and pressure, with lees or size, without spinning or weaving.
From Middle English felt, from Old English felt, from Proto-West Germanic *felt (compare Dutch vilt, German Filz, Danish filt, French feutre), from Proto-Indo-European *pilto, *pilso 'felt' (compare Latin pilleus ("felt"), Old Church Slavonic плъсть, Albanian plis, Ancient Greek πῖλος), from *pel- 'to beat'. More at anvil.