antiworld

noun

an·​ti·​world

ˈanˌtī,

ˈantē,

ˈantə̇ + ˌ

: the hypothetical antimatter counterpart of a world

Word History

Etymology

anti- entry 1 + world entry 1

First Known Use

circa 1958, in the meaning defined above

Love words?

You must — there are over 200,000 words in our free online dictionary, but you are looking for one that’s only in the Merriam-Webster Unabridged Dictionary.

Start your free trial today and get unlimited access to America's largest dictionary, with:

• More than 250,000 words that aren't in our free dictionary
• Expanded definitions, etymologies, and usage notes
• Advanced search features
• Ad free!