Definition of introit
1 often capitalized : the first part of the traditional proper of the Mass consisting of an antiphon, verse from a psalm, and the Gloria Patri
2 : a piece of music sung or played at the beginning of a worship service
Origin of introit
Middle English, from Medieval Latin introitus, from Latin, entrance, from introire to go in, from intro- + ire to go — more at issue
First Known Use: 15th century
Seen and Heard
What made you want to look up introit? Please tell us where you read or heard it (including the quote, if possible).