Answer
The answer is no, Ionesco's theatre is not categorized as realism. Instead, it falls under the umbrella of Theatre of the Absurd, a post-World War II movement characterized by its rejection of traditional forms and its exploration of existential themes such as the meaninglessness of life and the absurdity of human existence. Ionesco's plays are known for their use of symbolism, metaphor, and non-linear narratives to convey these themes.