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

Plus, the addition of broad-spectrum SPF helps prevent sun damage, one of the contributing factors to premature aging. —Erika Reals, InStyle, 27 Feb. 2026

Australian sunscreens are often rated some of the best in the world, and this travel-friendly stick from Australian-brand Naked Sundays is a favorite for many Amazon shoppers thanks to its clear finish, convenient format, and broad-spectrum protection. —Kristy Alpert, Travel + Leisure, 25 Feb. 2026

The current first-choice treatment for sepsis focuses on using broad-spectrum antibiotics to attack the pathogen causing the condition. —Harriet Marsden, TheWeek, 20 Feb. 2026

The lightweight, glow-boosting oil delivers broad-spectrum chemical SPF while nourishing skin with a thoughtful blend of oils. —Christa Joanna Lee, Allure, 5 Feb. 2026

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