Definitions

1. adjective

relating to or characterized by antiphony, especially in music or poetry, where two or more parts are interwoven in alternate or simultaneous performance

“The choir’s antiphonetic rendition of the hymn created a beautiful harmony between the two groups of singers.”

2. noun

a phrase or verse that is sung or recited by one party in alternation with another, typically in a church service

“The antiphonetic chants were an integral part of the medieval liturgy.”