Manpower refers to the total supply of persons available and fitted for service. It can mean "labor force," "workforce," "workers," or simply "people," and despite the "man" in the term, it applies to both men and women. Manpower can also refer to a unit of power, assumed to be equal to the rate at which a person can do mechanical work, and commonly taken as 1/10 (0.1) horsepower.

Manpower is often used in the context of employment and staffing. ManpowerGroup, for example, is a global workforce solutions company that helps organizations transform in a fast-changing world of work by sourcing, connecting, and developing skilled talent.

In summary, manpower refers to the total supply of persons available and fitted for service, and it can also refer to a unit of power. It is often used in the context of employment and staffing.