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vault light

American  

noun

  1. a windowlike structure set in a pavement or the like to illuminate areas beneath, consisting of thick glass blocks set in a metal frame.

Example Sentences

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I made the deputy sit down under the vault light while I worked the combination.

From Branded by Lynde, Francis

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.