# fenestra

> English word · Noun

## Definitions
1. An opening in a body, sometimes with a membrane.

## Etymology
Unadapted borrowing from Latin fenestra. Existed in Middle English as fenestre, fenester, from Old English fenester (“window”).

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/fenestra