DICT.TW Dictionary Taiwan

 pil·lion /ˈpɪljən/
 婦女用馬鞍,後部座位

 Pil·lion n.
 1. A panel or cushion saddle; the under pad or cushion of saddle; esp., a pad or cushion put on behind a man's saddle, on which a woman may ride.
    His [a soldier's] shank pillion without stirrups.   --Spenser.
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 pillion
      n : a seat behind the rider of a horse or motorbike etc.