lighttight
American
[lahyt-tahyt]
/ ˈlaɪtˌtaɪt /
adjective
Chiefly British.
Etymology
Origin of lighttight
1880–85; light 1 + tight, on the model of watertight, airtight, etc.
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Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
