annunciative
/ˌæn.ʌn.siˈæ.tɪv/ or /ˌæn.ʌn.siˈæ.tɪv/ (English)
Definitions
1. adjective
of or relating to announcements or the act of announcing
“The annunciative system in the theater alerted the audience to the start of the show.”
2. noun
something that announces or serves as a means of announcement
“The fire alarm served as an annunciative warning to evacuate the building.”