WORD MEANING
Interstitial meaning
in-ter-STISH-uhl · adjective
Relating to or situated in the small spaces or gaps between things, especially in tissues or structures.
See all 16 words from the October 24, 2026 puzzle →Other meanings
A type of advertisement that appears between content pages, often on websites or apps.
In medicine, referring to fluid or inflammation occurring in the spaces between cells or tissues.
In geology, describing minerals or materials that fill the spaces between grains in a rock.
The term can be used in medical, technological, geological contexts, and as an adjective or noun.
Examples
The doctor explained the interstitial lung disease to the patient.
Interstitial spaces in the tissue were filled with fluid after the injury.