Definitions

1. noun

A person who makes a telephone call.

“The caller hung up without leaving a message.”

2. noun

A person who participates in or initiates a process or event, such as a meeting, a call, or an election.

“The voter is the caller in this election.”

3. noun

In a telephone system, the device or station that originates a call.

“The caller is connected to the server.”

4. verb

To initiate or make a telephone call.

“She will call him later.”