pray-in

[ prey-in ]
/ ˈpreɪˌɪn /

noun

a form of social protest in which demonstrators engage in passive resistance and prayer: popular especially in the 1970s.

Origin of pray-in

First recorded in 1960–65; pray + -in3
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019