black light

noun

1

: invisible ultraviolet light

2

: a lamp that radiates black light

Examples of black light in a Sentence

Recent Examples on the Web

Ultraviolet light, or black light, detection is used to check for watermarks that can’t be seen by the naked eye. — Bestreviews, Chicago Tribune, 24 Sep. 2026

DayGlo pigments were used extensively during World War II to make fluorescent fabric panels for US ground troops, while DayGlo’s black light paints were used on Navy aircraft carriers to enable planes to land at night. — ArsTechnica, 25 Aug. 2026

See an 850-pound chunk of copper as well as rocks that glow neon under black lights. — Samantha Lande, Midwest Living, 30 July 2026

Many things show up under the black lights used in pet urine detectors. — Bestreviews, Mercury News, 27 July 2026

Word History

First Known Use

1913, in the meaning defined at sense 1

Rhymes for black light

• affright
• airtight
• albite
• alight
• alright
• aplite
• aright
• bainite
• birthright
• bobwhite
• bornite
• bullfight

Kids Definition

black light

noun

: invisible ultraviolet or infrared light