[see-zuh-roh-pey-piz-uh m]
  1. the possession of supreme authority over church and state by one person, often by a secular ruler.
  2. the supremacy of the state over the church in ecclesiastical matters.

Origin of caesaropapism

First recorded in 1885–90; Caesar + -o- + papism
Related formscae·sa·ro·pap·ist, noun, adjective Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018