a psalm or antiphon sung or said while the priest approaches the altar for the Eucharist (牧师走向圣餐礼祭坛时诵唱的)圣歌;轮唱圣诗
语源
late Middle English (denoting an entrance or the action of going in): via Old French from Latin introitus, from introire 'enter', from intro- 'to the inside' + ire 'go'