Definitions
1.nounThe person who makes a telephone call."- I've got someone on the line."
2.nounA visitor."a gentleman caller"
3.noun(bingo) The person who stands at the front of the hall and announces the numbers.
4.nounA function that calls another (the callee).
5.nounA whistle or similar item used to call foxes.
6.nounThe person who directs dancers in certain dances, such as American line dances and square dances.