broad-spectrum

adjective

broad-spec·​trum ˈbrȯd-ˈspek-trəm 

1

: effective against a wide range of organisms (such as insects or bacteria)

a broad-spectrum antibiotic

2

: effective in protecting skin from ultraviolet radiation by absorbing or blocking both UVA and UVB rays

broad-spectrum sunscreens

Examples of broad-spectrum in a Sentence

Recent Examples on the Web

The light-to-medium coverage builds to veil imperfections while imparting broad-spectrum UVA/UV SPF 30 protection sans white cast. —Conçetta Ciarlo, Vogue, 26 June 2025

This shimmering sunscreen body oil will leave you with an instant glow—and broad-spectrum protection from the sun. —Kayla Greaves, Essence, 23 June 2025

Using a broad-spectrum sunscreen protects your skin against both UVA and UVB rays. —Sarah Bence, Verywell Health, 9 June 2025

And speaking of the sunny season, the formula protects the skin from UV damage with broad-spectrum, SPF 46 protection. —Jenny Berg, Vogue, 13 June 2025

Word History

First Known Use

1950, in the meaning defined at sense 1

Rhymes for broad-spectrum

• electrum
• spectrum

Medical Definition

broad-spectrum

adjective

1

: effective against a wide range of organisms (as insects or bacteria)

broad-spectrum antibiotics

compare narrow-spectrum

2

: effective in protecting skin from ultraviolet radiation by absorbing or blocking both UVA and UVB rays

broad-spectrum suncreen