Definition of Rotarianism in US English:

Rotarianism

noun

US
  • The principles or practice of the Rotary organization; the way of life held to be characteristic of Rotarians.

Origin

Early 20th century. From Rotarian + -ism.

Pronunciation

Rotarianism

/rə(ʊ)ˈtɛːrɪənɪz(ə)m/