caller
nounUK /ˈkɔːlə/
US /ˈkɔːlər/
A caller is a person who calls someone on the phone.
The caller asked to speak to my mom.
OTHER MEANINGS
2. A person who visits your home for a short time.
We had a caller at the door this morning.
3. A person who shouts out names or numbers, like at a dance or bingo game.
The caller read the next bingo number loudly.
4. In square dancing, the person who tells the dancers what moves to do.
The caller kept the dancers moving in time.