› [ U] help, ideas, or knowledge that someone gives to a project, organization, etc.: input from sb/sth We had a very productive meeting with a lot of good input from the technical department. input on sth We want input on product development from employees and potential customers. › [C or U] ECONOMICS a resource such as materials or labour that is involved in producing something and has a cost that affects profits: The majority of input costs are related to the cost of the workforce. › [ U] IT the information that you put into a computer: Words in the input that are not spelled correctly will be highlighted. › [ U] IT the act of putting information into a computer: fields used for data input › [C] IT a part that carries information to a machine, or the place where this is connected: a digital video input → Compare output noun