Step 1: Understanding the Concept:
The question asks for the economic meaning of "cost," which is a central concept for firms in the theory of production.
Step 2: Detailed Explanation:
In economics, Cost refers to the total expenditure incurred by a firm in producing a good or service. It includes all the payments made to the factors of production (land, labor, capital, entrepreneurship) and for the purchase of non-factor inputs (like raw materials).
Economic cost is a broader concept than accounting cost and includes:
\begin{itemize}
\item Explicit Costs: These are the direct, out-of-pocket payments made by a firm to others for resources, such as wages, rent, and cost of materials.
\item Implicit Costs: These are the imputed or opportunity costs of using the firm's self-owned, self-employed resources. For example, the salary the owner could have earned by working elsewhere.
\end{itemize}
Total Economic Cost = Explicit Costs + Implicit Costs.
Step 3: Final Answer:
Cost is the total monetary expenditure, both explicit and implicit, incurred by a producer in the process of transforming inputs into outputs.