n.
Pronunciation: ' in- ˌ tro ̇ it, - ˌ tr ō - ə t, in- '
Function: noun
Etymology: Middle English, from Medieval Latin introitus, from Latin, entrance, from introire to go in, from intro- + ire to go ― more at ISSUE
Date: 15th century
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