1
: the arrangement, proportioning, and design of windows and doors in a building
2
: an opening in a surface (such as a wall or membrane)
3
: the operation of cutting an opening in the bony labyrinth between the inner ear and tympanum to replace natural fenestrae that are not functional

Examples of fenestration in a Sentence

Recent Examples on the Web
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.
The revolving doors and complex fenestration made entering the museum crowded and confusing. Dodie Kazanjian, Vogue, 5 Aug. 2024 Mongolian gerbils who receive semicircular canal fenestration in their left inner ears offer a successful animal model for superior semicircular canal dehiscence. Michael W. Clune, Harper’s Magazine , 10 Apr. 2023

Word History

First Known Use

1846, in the meaning defined at sense 1

Time Traveler
The first known use of fenestration was in 1846

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Cite this Entry

“Fenestration.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/fenestration. Accessed 10 Apr. 2025.

Medical Definition

fenestration

noun
1
a
: a natural or surgically created opening in a surface
b
: the presence of such openings
2
: a surgical procedure that involves cutting an opening in the bony labyrinth between the inner ear and tympanum to replace natural fenestrae that are not functional (as in otosclerosis)
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