pillion definition by Webster's New World
- a cushion attached behind a saddle for an extra rider, esp. a woman, as in medieval times
- an extra saddle behind the driver's on a motorcycle
Origin: Gaelic pillean ; from peall, a hide, skin, ultimately ; from Classical Latin pellis: see fell
pillion definition by American Heritage Dictionary
- A pad or cushion for an extra rider behind the saddle on a horse or motorcycle.
- A bicycle or motorcycle saddle.
Origin: Probably from Scottish Gaelic pillean, diminutive of peall, rug, or Irish Gaelic pillín, diminutive of pell, rug, both from Old Irish pell, from Latin pellis, animal skin; see pel-3 in Indo-European roots.