street theater definition by Webster's New World
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
an amateur theatrical production performed in a street, park, etc. or indoors, usually for a nonpaying audience, with an improvised script generally on a social or political theme
street theater definition by American Heritage Dictionary
Dramatization of social and political issues, usually enacted outside, as on the street or in a park. Also called guerrilla theater.