antiˈphonically,adv. [f.prec. + -ly2.] In an antiphonic or antiphonal manner; antiphonally. 1846W. Maskell Mon. Rit. I. Introd. 34 Portions of the services..sung..antiphonically.1851Q. Rev.No. 177. 237 The singers, for their own ease, sang them antiphonically.