caller

noun ! Definition from Wiktionary (CC BY-SA). Pronunciation from Wiktionary, via Kaikki.org. More about caller at Wordnik → Where our words come from →

1. The person who makes a telephone call.

   ―I’ve got someone on the line.―Who’s the caller?

2. A visitor.

   a gentleman caller

3. The person who stands at the front of the hall and announces the numbers.