Definition of "caller" in English

noun

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

4. (programming) A function that calls another (the callee).

   • If the called function throws an exception, the caller should be prepared to handle the error.

5. A whistle or similar item used to call foxes.

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