LIGHTPROOF Synonyms: 23 Similar and Opposite Words

lightproof

adjective

Definition of lightproof

as in waterproof

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Example Sentences

Recent Examples of Synonyms for lightproof

Adjective

This mattress pad from a top brand offers superior waterproof protection and 10 heat settings.

— BestReviews, Mercury News, 30 July 2026
The lightweight, waterproof, and washable style is available for $50 at REI.

— Destinee Scott, Travel + Leisure, 28 July 2026

Definition of waterproof

Adjective

The bottom-most level, meanwhile, is spotlighted by a soundproof movie theater, a 1,000-bottle wine cellar, and a wellness wing with a gym, a sauna, and a tranquil rock waterfall.

— Wendy Bowman, Robb Report, 29 July 2026
The design of the guest rooms is equal parts retro and brutalist, while the spaces remain comfortable and, most importantly, soundproof.

— Lindsey Tramuta, Travel + Leisure, 23 May 2026

Definition of soundproof

Adjective

For now, access appears limited to the steadily expanding group of organizations granted access to Claude Mythos Preview through Anthropic’s — not entirely watertight — private Project Glasswing initiative.

— Robert Hart, The Verge, 9 June 2026
Tunnels are also not truly watertight, requiring drainage measures like sump pumps and creating maintenance and reliability issues, the group advised.

— Skyler Swisher, The Orlando Sentinel, 15 Feb. 2026

Definition of watertight

Adjective

The opening moments of this penultimate episode evoke enough genuine idealism and hope to feel like a rare breath of fresh air, holding the hermetic nastiness of the series in sharp relief.

— Scott Tobias, Vulture, 17 May 2026
The idea was first proposed by Cicero and lived on through the hermetic tradition.

— Literary Hub, Literary Hub, 13 May 2026

Definition of hermetic

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.

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lightplanes

lightproof

lights

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“Lightproof.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/lightproof. Accessed 6 Aug. 2026.

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Synonyms of lightproof

adjective

Example Sentences

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