ultraslow

adjective
ul·​tra·​slow | \ ˌəl-trə-ˈslō How to pronounce ultraslow (audio) \

Definition of ultraslow

: moving with, exhibiting, or marked by extremely low speed : extremely or extraordinarily slow ultraslow motion

First Known Use of ultraslow

1870, in the meaning defined above

Keep scrolling for more

Learn More about ultraslow

Time Traveler for ultraslow

Time Traveler

The first known use of ultraslow was in 1870

See more words from the same year

Statistics for ultraslow

Cite this Entry

“Ultraslow.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/ultraslow. Accessed 4 Mar. 2021.

Style: MLA
MLA Chicago APA Merriam-Webster

More from Merriam-Webster on ultraslow

Thesaurus: All synonyms and antonyms for ultraslow

Comments on ultraslow

What made you want to look up ultraslow? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

Test Your Vocabulary

Who Knew?

How Strong Is Your Vocabulary?

Test your vocabulary with our 10-question quiz!

TAKE THE QUIZ
Typeshift

Anagram puzzles meet word search.

TAKE THE QUIZ
Love words? Need even more definitions?

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