Definition of felt:
(n) :
a
cloth or stuff made of
matted
fibres 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; a
hat made of felt. —
Thynne
"it were a delicate stratagem to shoe A troop of horse with felt. — Shakespeare, King Lear, IV-vi"
(v) :
to make into felt, or a feltlike substance; to cause to adhere and mat together. —
Sir M. Hale; to cover with, or as with, felt; as, to felt the cylinder of a steam emgine