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

Use a broad-spectrum sunscreen with an SPF of at least 15 to protect skin that is not covered by clothing; however, higher SPFs can offer additional protection. —Lana Barhum, Verywell Health, 19 July 2025

The mousse-like texture blends easily, dries quickly, and leaves behind a soft golden sheen, not to mention broad-spectrum SPF 30 protection. —Marie Lodi, Allure, 16 July 2025

All of our experts emphasize this point: daily broad-spectrum SPF of at least 30 is a must. —Larry Stansbury, Essence, 14 July 2025

Don’t forget the sunscreen Looking toward the rest of that sun protection, a broad-spectrum, water-resistant sunscreen with an SPF of at least 30 will often be sufficient to protect your skin from dangerous UV radiation. —Kansas City Star, 11 July 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