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 formula gets its sunray-shielding benefits from broad-spectrum chemical UV filters, which safeguard against damage while ensuring skin remains moisturized via aloe, hyaluronic acid, and squalane. —Kiana Murden, Vogue, 17 Oct. 2025

Aside from a heaping serving of broad-spectrum SPF 50, this formula delivers nourishing additives that bridge the gap between skin tint and moisturizer. —Lily Wohlner, Allure, 8 Oct. 2025

Heavy occlusives can trap debris and worsen breakouts; keep textures light, focus on humectants like glycerin or hyaluronic acid, and always, always add a broad-spectrum sunscreen. —Larry Stansbury, Essence, 7 Oct. 2025

Green advises following the American Academy of Dermatology’s guidance to apply a broad-spectrum, water-resistant sunscreen to your fingers and the backs of your hands before a gel manicure, or to wear a pair of opaque fingerless gloves. —Holly Burns, Time, 30 Sep. 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