caller

B2 · Upper Intermediate Countable noun Formal

n. a person who visits a place or someone's home.

n. a person who pays a visit, often used in a slightly formal or traditional context.

“We weren't expecting any callers so late in the evening.”

“The old manor house rarely received callers, as the owner preferred a life of quiet seclusion.”

B2 · Upper Intermediate Countable noun

n. the person who calls out numbers in a game like bingo or tells dancers which moves to make.

n. the person responsible for announcing numbers in games of chance or directing participants in traditional dances.

“The bingo caller shouted the numbers clearly so everyone could hear.”

“The square dance caller kept the energy high, guiding the couples through a series of increasingly complex patterns.”

C1 · Advanced Countable noun Computing Technical

n. a piece of computer code that starts or runs another piece of code.

n. a function or routine that invokes another function, which is known as the callee.

“The error happened because the caller sent the wrong type of data.”

“If the callee encounters an exception, it must be handled by the caller to prevent the entire application from crashing.”