kaiju

noun

kai·​ju ˈkī-(ˌ)jü How to pronounce kaiju (audio)
plural kaiju
in fiction
: a giant and destructive monster
… a chaotic kaiju who destroys cities.Anthony Gramuglia
… the iconic, and titular, kaiju rose from the sea and decimated a post-WWII Japan …Philip Sledge
He balances protecting civilians and getting the kaiju somewhere safe where neither it nor anyone else can get hurt.Sarah Chaudhry
Godzilla belongs to a species of postwar monsters called kaijuAatish Taseer and Tess Ayano
often used before another noun
I grew up watching these sillier kaiju movies …Joey Shapiro
… the film delivers the best kaiju fight in the entirety of the series …Kyle Logan
… leading to the post-apocalyptic present day when kaiju attacks are a near-constant threat to humanity.Corey Plante

Word History

Etymology

borrowed from Japanese kaijū "monster," from kai "strange, weird" + "animal, beast"

First Known Use

1972, in the meaning defined above

Time Traveler
The first known use of kaiju was in 1972

Browse Nearby Words

Cite this Entry

“Kaiju.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/kaiju. Accessed 6 Mar. 2026.

Last Updated: - Entry added
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!

More from Merriam-Webster