'main street' definitions:

Definition of 'main street'

(from WordNet)
noun
Street that serves as a principal thoroughfare for traffic in a town [syn: main street, high street]
noun
Any small town (or the people who inhabit it); generally used to represent parochialism and materialism (after a novel by Sinclair Lewis); "Main Street will never vote for a liberal politician"

Definition of 'main street'

From: GCIDE
  • main street \main street\ n.
  • 1. A main thoroughfare, usually one in a small town having the largest concentration of retail businesses. [PJC]
  • 2. Hence: (Fig.) The attitudes, environment, or life style of a small town; -- usually capitalized, and often used attributively; as, Main Street attitudes toward Washington. [PJC]