A seat for a rider, --
usually made of leather, padded to span comfortably a horse's back,
furnished with stirrups for the rider's feet to rest in, and fastened
in place with a girth; also, a seat for the rider on a bicycle or
tricycle.
A padded part of a harness which is worn on
a horse's back, being fastened in place with a girth. It serves
various purposes, as to keep the breeching in place, carry guides for
the reins, etc.
A piece of meat containing a part of the
backbone of an animal with the ribs on each side; as, a saddle
of mutton, of venison, etc.
A block of wood, usually
fastened to some spar, and shaped to receive the end of another
spar.
A part, as a flange, which
is hollowed out to fit upon a convex surface and serve as a means of
attachment or support.
The clitellus of an
earthworm.
The threshold of a door,
when a separate piece from the floor or landing; -- so called because
it spans and covers the joint between two floors.
In celebration of Noah Webster's Birthday (October 16, 2009), we have prepared an updated website. 
