caller

noun

1. 1

   The person who makes a telephone call.

   “- I've got someone on the line.”

2. 2

   A visitor.

   “a gentleman caller”

3. 3

   (bingo) The person who stands at the front of the hall and announces the numbers.

4. 4

   A function that calls another (the callee).

5. 5

   A whistle or similar item used to call foxes.

6. 6

   The person who directs dancers in certain dances, such as American line dances and square dances.