1. Noun, Noun which may take the genitive case particle 'no'

   old person; elderly person; senior citizen

   Sensitive

   目が見えない看護婦は年寄りの世話をすることに一身を捧げた。

2. Noun

   trustee of the Japan Sumo Association; retired high-ranking wrestler who is licensed to coach and receives retirement pay

   Sumo

3. senior statesman (of the Tokugawa shogunate)

4. important local official (under the Tokugawa Shogunate)

Also written 年寄【としより】toshiyori、年より【としより】toshiyori