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

Featuring both contemporary and historical artists from Japan and abroad, TOP offers a broad-spectrum view on the medium of photography. —Jessica Kozuka, Travel + Leisure, 13 Mar. 2026

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

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