Improv

Short for improvisation, the term refers to the art of creating performance material spontaneously without a script, most commonly associated with improvisational theatre and comedic performance. In theatrical contexts, improv encompasses a wide range of formats, from short-form games popularized by Whose Line Is It Anyway? to long-form structures such as the Harold, developed at iO Chicago. The word gained widespread use in the mid-twentieth century as improvisational theatre grew from its roots in Viola Spolin's theatre games and Keith Johnstone's Theatresports into a global movement with dedicated training centers, festivals, and professional companies. While "improvisation" appears across disciplines including music, dance, and corporate training, "improv" almost exclusively signals the theatrical tradition and its offshoots. The practice relies on core principles such as agreement (often summarized as "yes, and"), active listening, and ensemble support. Performers build scenes collaboratively by accepting and heightening each other's contributions in real time. Beyond the stage, improv techniques have been adopted in education, psychotherapy, organizational development, and communication training, making the term familiar well outside performing arts circles. Whether used as a noun describing the art form or as an adjective modifying related activities (improv class, improv show, improv troupe), the word carries an inherent association with spontaneity, collaboration, and creative risk.