The concept of the universe is vast and incomprehensible, but its antonyms can help shed light on its limits. Firstly, there's the term "microcosm," which refers to a small or miniature version of the universe. Conversely, "macrocosm" refers to the universe as a whole or everything that exists beyond our planet. Another antonym is "multiverse," a theoretical concept suggesting the existence of countless parallel universes. Finally, there's "void," which is the absence of anything, a vacuum, or a space that contains no matter. These antonyms provide a glimpse into the mysteries of the universe and offer some perspective on the vastness of our existence.