"In practice, The Theatre of the Absurd departs from realistic characters, situations and all of the associated theatrical conventions. Time, place and identity are ambiguous and fluid, and even basic causality frequently breaks down. Meaningless plots, repetitive or nonsensical dialogue and dramatic non-sequiturs are often used to create dream-like, or even nightmare-like moods." (wikipedia)
+ http://www2.arts.gla.ac.uk/Slavonic/Abs