interstitial
adjective
in·ter·sti·tial
ˌin-tər-ˈsti-shəl 
1
: occurring in or being an interval or intervening space or segment : of, relating to, or forming an interstice
an interstitial space
… the site has been running interstitial ads, which consist of a full page of advertising between editorial pages, for a little more than a year.—
Carl Sullivan
Carl Sullivan2
a
: situated within but not restricted to or characteristic of a particular organ or tissue
—used especially of fibrous tissue
b
: affecting the interstitial tissues of an organ or part
interstitial cystitis
3
: being or relating to a crystalline compound in which usually small atoms or ions of a nonmetal occupy holes between the larger metal atoms or ions in the crystal lattice
Examples of interstitial in a Sentence
Recent Examples on the Web
It’s set in the present but several interstitial chapters flash back to the ‘80s and ’90s, when the women were getting their start as ruthless-but-funny contract killers.
—Chris Hewitt, Boston Herald, 23 Mar. 2025
Plenty of other conditions like pelvic floor dysfunction, interstitial cystitis (a.k.a. painful bladder syndrome), and yeast infections can be easy to confuse with UTIs.
—Korin Miller, SELF, 17 Mar. 2025
However, subsequent updates removed legitimate functionality, replacing it with tactics to maximize ad revenue through full-screen interstitial video ads.
—Zak Doffman, Forbes, 5 Mar. 2025
She was tested for Celiac disease and Crohn's disease before landing on the interstitial cystitis diagnosis, and even developed an eating disorder and experienced hair loss during that time.
—Jessica Wang, EW.com, 23 Jan. 2025
See All Example Sentences for interstitial
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Chris Hewitt, Boston Herald, 23 Mar. 2025
Plenty of other conditions like pelvic floor dysfunction, interstitial cystitis (a.k.a. painful bladder syndrome), and yeast infections can be easy to confuse with UTIs.
—Korin Miller, SELF, 17 Mar. 2025
However, subsequent updates removed legitimate functionality, replacing it with tactics to maximize ad revenue through full-screen interstitial video ads.
—Zak Doffman, Forbes, 5 Mar. 2025
She was tested for Celiac disease and Crohn's disease before landing on the interstitial cystitis diagnosis, and even developed an eating disorder and experienced hair loss during that time.
—Jessica Wang, EW.com, 23 Jan. 2025
See All Example Sentences for interstitial
Cite this Entry
“Interstitial.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/interstitial. Accessed 30 Mar. 2025.
Copy CitationKids Definition
interstitial
adjective
in·ter·sti·tial
ˌint-ər-ˈstish-əl
: relating to or located in the interstices
Medical Definition
interstitial
adjective
in·ter·sti·tial
ˌint-ər-ˈstish-əl
1
: situated within but not restricted to or characteristic of a particular organ or tissue
—used especially of fibrous tissue
2
: affecting the interstitial tissues of an organ or part
interstitial hepatitis
3
: occurring in the part of a fallopian tube in the wall of the uterus
interstitial pregnancy
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