The geographic, demographic or other customer classification targeted by an organization for the purchase and use of its products and services.

a group of individuals within a larger market who share one of more important characteristics resulting in similar purchasing needs and behaviors (p. 163)

A sub section of a market with more refined characteristics; for example, electronics manufacturing or residential construction.

EPRI has identified four market segments for which it develops products and services: environment, generation, nuclear, and power delivery and markets.

Market segmentation is the process in marketing of dividing a market into distinct subsets (segments) that behave in the same way or have similar needs. Because each segment is fairly in their needs and attitudes, they are likely to respond similarly to a given marketing strategy. That is, they are likely to have similar feelings and ideas about a marketing mix comprised of a given product or service, sold at a given price, distributed in a certain way, and promoted in a certain way.

A part of a market that relates to a place, an exchange authority, a type of security (equity / bond / option / future), and a list of securities with a given set of trading methods.

a part of a larger market with similar features