interdimensional

American  

[in-ter-di-men-shuh-nl, dahy-] / ˌɪn tər dɪˈmɛn ʃə nl, daɪ- /

adjective

1. existing or traveling between dimensions of space or time.

   The best thing about an interdimensional space and time machine is that you never know quite when one is going to pop up.

2. (in science fiction, fantasy, etc.) coming from an alternate dimension or a parallel universe.

   There's a wide range of character options, including an unholy paladin, an interdimensional warlord, a reptilian soothsayer, and an anarchist obsessed with transhumanism.

   I prefer the terms extraterrestrials or interdimensional beings.

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Etymology

Origin of interdimensional

First recorded in 1950–55; inter- ( def. ) + dimension ( def. ) + -al ¹ ( def. )

Example Sentences

Apers believe Bigfoot is just a primate unknown to science while Woo-Woos think Bigfoot is some sort of interdimensional traveller - an alien of sort.

From BBC • Apr. 3, 2026

But the agency did discover that a network of UFO believers within the Defense Department had created a program that investigated accounts of interdimensional creatures and werewolves on a ranch in Utah.

From The Wall Street Journal • Feb. 22, 2026

The interdimensional UFO or UAP hypothesis has a considerable history in academia and has been advanced by renown scientists such as Jacques Vallée.

From Salon • Sep. 10, 2023

To an outsider, Isis’ casual references to telepathy and interdimensional existence may sound delusional.

From Los Angeles Times • Apr. 12, 2023

Observing a particularly attractive and congenial-looking square entering its flat house, the apple decides, in a gesture of interdimensional amity, to say hello.

From "Cosmos" by Carl Sagan