as in bottom
the side or part facing downward from something
the underside of the cat's coat is pure white
Synonyms & Similar Words
Relevance
Antonyms & Near Antonyms
Example Sentences
Examples are automatically compiled from online sources to
show current usage.
Read More
Opinions expressed in the examples do not represent those of Merriam-Webster or its editors.
Send us feedback.
Recent Examples of underside
No, not at it straight-on, but looked at the underside of the faucet, where the water actually flows out.
—
Stephanie Osmanski, Better Homes & Gardens, 27 Jan. 2026
Meanwhile ice can accrete on both the top and underside of branches and power lines.
—Andrea Thompson, Scientific American, 26 Jan. 2026
The soft flannel top and plush faux shearling fleece underside provide excellent heat retention for serious coziness.
—Jacquelyn McGilvray, PEOPLE, 22 Jan. 2026
On the underside of its cap are white gills and spores.
—Karen Garcia, Los Angeles Times, 17 Jan. 2026
See All Example Sentences for underside
Stephanie Osmanski, Better Homes & Gardens, 27 Jan. 2026
Meanwhile ice can accrete on both the top and underside of branches and power lines.
—Andrea Thompson, Scientific American, 26 Jan. 2026
The soft flannel top and plush faux shearling fleece underside provide excellent heat retention for serious coziness.
—Jacquelyn McGilvray, PEOPLE, 22 Jan. 2026
On the underside of its cap are white gills and spores.
—Karen Garcia, Los Angeles Times, 17 Jan. 2026
See All Example Sentences for underside
Recent Examples of Synonyms for underside
bottom
Noun
-
Spanxsmooth Swim styles will include string bikini tops and bottoms, a bandeau bikini top, and a scoop-neck one-piece.—
Lisa Lockwood,
Footwear News,
11 Feb. 2026
-
Neodymium is a rare earth, one of the minerals near the bottom of the periodic table that are crucial for everyday life.—
Chris Isidore,
CNN Money,
11 Feb. 2026
Cite this Entry
“Underside.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/underside. Accessed 15 Feb. 2026.
Copy CitationLove words? Need even more definitions?
Merriam-Webster unabridged
