as in lamp
something that provides illumination
at the time, a spermaceti candle was the brightest indoor illuminant available
Synonyms & Similar Words
Relevance
Example Sentences
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.
Recent Examples of illuminant
Related Stories For the Judge LED, users can choose seven light sources from a selection of different temperatures that fit industry standards, including a directional daylight output with the standard illuminant D65.
—
Sarah Jones, Sourcing Journal, 16 Jan. 2025
Distilling rock oil produced multiple interesting compounds, one of which looked like an ideal illuminant.
—Charles R. Morris, WSJ, 21 June 2018
Sarah Jones, Sourcing Journal, 16 Jan. 2025
Distilling rock oil produced multiple interesting compounds, one of which looked like an ideal illuminant.
—Charles R. Morris, WSJ, 21 June 2018
Recent Examples of Synonyms for illuminant
Noun
-
Instead, its discreet entrance beckons you into a foyer alight with more than a dozen dangling glass lamps crafted by Barovier & Toso of Murano, and a sketch-like portrait of the actress Monica Vitti by the Franco-Chinese painter Yan Pei-Ming.—
Condé Nast,
Condé Nast Traveler,
4 June 2026
-
The same circadian system that morning sunlight activates can be reinforced or undermined by what’s screwed into your lamps for the next 14 hours.—
Allison Palmer
June 2,
Fort Worth Star-Telegram,
2 June 2026
Noun
-
Gabriel leans into the music, and the bell of his sax catches the light, flashing gold with each movement.—
Arati Menon,
Condé Nast Traveler,
7 June 2026
-
The gallery will envelop visitors — think rippling blue lights, ocean sounds and activity stations.—
Michael James Rocha,
San Diego Union-Tribune,
7 June 2026
Noun
-
Overhead lighting also results in the space feeling long and thin.—
Shagun Khare,
The Spruce,
7 June 2026
-
The move could help strengthen domestic supply chains for semiconductors, LED lighting, and other advanced technologies.—
Atharva Gosavi,
Interesting Engineering,
6 June 2026
Noun
-
Always unplug electric candle warmers, space heaters, and similar devices when not in use to avoid fire hazards.—
Emily Williams,
Better Homes & Gardens,
3 June 2026
-
These misshapen and withered figurines—a teddy bear with a candle and a turkey in pointed shoes—looked over at the photos from low plinths in one corner of the gallery.—
Theo Belci,
Artforum,
2 June 2026
Cite this Entry
“Illuminant.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/illuminant. Accessed 9 Jun. 2026.
Copy CitationLove words? Need even more definitions?
Merriam-Webster unabridged
