A "Call" refers to the act of communicating with someone using a telephone or other communication device. It can involve voice conversations, video chats, or even text messages. Calls can be made for various purposes, such as personal conversations, business meetings, or emergency situations. In the context of technology, a call can also refer to a request made by a computer program to another program or service. This is often seen in software development, where a program may "call" a function or an application programming interface (API) to perform a specific task or retrieve data.