The term "high volume" refers to a large amount or quantity of something. It can be used in various contexts, such as describing a high level of activity, sales, traffic, noise, or production. When speaking about a high volume of activity or sales, it means that there is an unusually large number of transactions taking place, often at a fast pace. In the case of traffic or noise, "high volume" implies that there is a lot of movement or sound happening simultaneously. Lastly, when referring to production, it indicates that a significant amount of goods are being produced in a short period of time.