ul·tra·thin
| \ ˌəl-trə-ˈthin
\
\
Definition of ultrathin
: extremely or extraordinarily thin
ultrathin phones ultrathin fashion models The molecules ride on the surface like a film of soap and assemble themselves into an ultrathin layer about one-millionth of an inch thick.— Mike May
Keep scrolling for more
Learn More About ultrathin
Statistics for ultrathin
Look-up Popularity
Cite this Entry
“Ultrathin.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/ultrathin. Accessed 24 Jun. 2021.
Style: MLA
MLA
Chicago
APA
Merriam-Webster
Chicago
APA
Merriam-Webster
Keep scrolling for more
More Definitions for ultrathin
ultrathin
adjective
ul·tra·thin
| \ ˌəl-trə-ˈthin
\
\
Medical Definition of ultrathin
: exceedingly thin
ultrathin sections for use in electron microscopy
Test Your Vocabulary
Return of Name that Color!
-
- Name that color:
Test your vocabulary with our 10-question quiz!
TAKE THE QUIZ
A daily challenge for crossword fanatics.
TAKE THE QUIZLove words? Need even more definitions?
Merriam-Webster unabridged
Words at Play
Ask the Editors
Word Games
-
Return of Name that Color!
Additional colors! More obscure than before!
Take the quiz -
Name that Thing: Dog Breeds
Can you correctly identify these breeds?
Take the quiz -
How Strong Is Your Vocabulary?
Test your vocabulary with our 10-question quiz!
Take the quiz -
Word Winder's CrossWinder
Play the game
Share ultrathin
Time Traveler for ultrathin
The first known use of ultrathin was in 1851
See more words from the same year