1610s, "a declarer, proclaimer," agent noun from announce. The radio sense is recorded from 1922.
Entries linking to announcer
announce v.
c. 1500, "proclaim, make known formally," from Old French anoncier "announce, proclaim" (12c., Modern French annoncer), from Latin annuntiare, adnuntiare "to announce, make known," literally "bring news to," from ad "to" (see ad-) + nuntiare "relate, report," from nuntius "messenger" (from PIE root *neu- "to shout"). Related: Announced; announcing.