- a baseball player who makes many extra-base hits.
- a very important or influential person: the secretary of state and other heavy hitters.
- informal another term for big hitter (def. 2)
An important or influential individual or organization. For example, This publishing house is one of the heavy hitters in the textbook industry. This expression originated in sports such as boxing, where it literally meant “hitting hard,” and was transferred to other enterprises in the mid-1900s.