n. Something put into a system or expended in its operation to achieve output or a result, especially:n. Energy, work, or power used to drive a machine.n. Current, electromotive force, or power supplied to an electric circuit, network, or device.n. Computer Science Information put into a communications system for transmission or into a computer system for processing.n. Computer Science A position, terminal, or station at which input enters a system.n. Any of the items, including materials, equipment, and funds, required for production.n. The act of putting in; infusion: a steady input of fuel. n. An amount put in.n. Usage Problem Contribution of information or a comment or viewpoint: a discussion with input from all members of the group. n. Usage Problem Information in general.v. Computer Science To enter (data or a program) into a computer.