Saddle

noun

1. A seat (tack) for a rider placed on the back of a horse or other animal.
2. An item of harness (harness saddle) placed on the back of a horse or other animal.
3. A seat on a bicycle, motorcycle, etc.
4. A cut of meat that includes both loins and part of the backbone.
5. A low point, in the shape of a saddle, between two hills.