something, e.g. energy, material, or data, supplied to a machine or system
an amount of anything coming or put in
in economics, a component of production, e.g. land, labour, or raw materials
work, suggestions, advice, etc that somebody contributes; a contribution
the point in a system, machine, etc at which an input, e.g. of energy, material, or data, is made
the act or an instance of putting something in