Definition of "pillion" [pil•lion]

• A pad or cushion for an extra rider behind the saddle on a horse or motorcycle. (noun)
• A bicycle or motorcycle saddle. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "A pillion was the grandest equipage, and a plain blue and white gown, with primly starched apron, was the common attire of the New England dames."
• "A pillion is a sort of a very low-backed arm-chair, and was fastened on the horse's croup, behind the saddle, on which a man rode who had all the care of managing the horse, while the lady sat at her ease, supporting herself by grasping a belt which he wore, or passing her arm around his body, if the _gentleman was not too ticklish_."
• "A pillion was a cushion strapped on behind a man's saddle, and from it sometimes hung a small platform or double stirrup on which a woman rider could rest her feet."